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1988 Chevy Blazer S-10 4x4 CODES?
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ryanmillay
User
Oct 18, 2011, 1:45 PM
Post #26 of 48
(2647 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Anyone care to help.????????????????????
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Sidom
Veteran
/ Moderator
Oct 18, 2011, 2:27 PM
Post #27 of 48
(2640 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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We're getting to the point of being stuck between & rock and a hard place.
You already done a lot with the tools you have & unfortunately nothing for sure has popped up. It's getting to the point of needing equipment you don't have. So the only thing left is to start throwing parts at it.......I'm not real comfortable with wasting your money.
The biggest problem is I can't feel what this miss feels like. Some scan data could really help narrow the search. If the fuel trims are way positive when its under load the that would be pointing in the direction of a fuel problem.
That's the problem, there is so many different things that could be causing this....weak fuel pump? partially restricted cat? weak coil? pickup coil shorting in the dist?? shorted wire? bad ground? Are we even sure it isn't mechanical???? Maybe the valves are sticking?????
You never really did answer my question on how you checked fuel pressure & I didn't see anything on if you did a volume test or anything on the backpressure or if you swept the TPS HT mentioned.
That's the thing with diags. Everyone has their own systems that work well for them. Some of the test are easy to run & some are a complete b*tch. You can't skip the hard ones, thats when things get missed & time and money are wasted.
In addition those things I mention you can get a spark tester & test your coil. Make sure it can put out at least 40kv & has a good blue spark. Without a scope this test isn't 100% but if you have coil only putting out 20kv with a yellow/orange spark that could be a problem.
My advise would be to walk away for a bit, get your mind off it, come back reread this thread, get an organized plan, follow thru with everything you can do & if still nothing pops up then, you did all you can do & should get a 2nd opinion. Sometimes it's cheaper & faster to pay the $100. Not every drivability problem can be diag'd at home.
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ryanmillay
User
Oct 18, 2011, 2:28 PM
Post #28 of 48
(2638 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Can ya help me?
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ryanmillay
User
Oct 18, 2011, 2:30 PM
Post #29 of 48
(2635 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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?
(This post was edited by ryanmillay on Oct 24, 2011, 9:52 AM)
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Sidom
Veteran
/ Moderator
Oct 18, 2011, 2:36 PM
Post #30 of 48
(2634 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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LOL
Oh yea that'll help........Nothing like going into it with a nice clear mind........I can't possibly forsee any problems here........
How bout u guy????? Guys????????? 
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Mr.scotty
Enthusiast
Oct 18, 2011, 6:02 PM
Post #31 of 48
(2626 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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I didn't see it above but,
Did you check the fuel pressure while the truck is messing up?
A scan tool sure would come in handy for ya.
Has this had plugs, wires and a cap and rotor or fuel filter lately?
It's not damp out or raining when it starts cutting out is it?
--------------------------------------------------------
Your only as good as your tools!
(This post was edited by Mr.scotty on Oct 18, 2011, 6:02 PM)
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ryanmillay
User
Oct 24, 2011, 8:36 AM
Post #32 of 48
(2613 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Alldata has the TPS sensor test as follows:
Jump the Dark Blue wire and the Black Wire to a volt meter. Reading should be (KOEO) .042 - .054
What I have is .0 but when I rotate the throttle and hold it at W.O.T. it reads 5v and falls slowly to .000 without moving it.
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ryanmillay
User
Oct 24, 2011, 8:38 AM
Post #33 of 48
(2610 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Plugs, Wires, Cap and Rotor are all new and timing is set (with the tan wire disconnected) at 8 Degree's Advanced.
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ryanmillay
User
Oct 24, 2011, 9:24 AM
Post #34 of 48
(2602 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Just test drove it again to give you a better perspective of what exactly is going on. When I'm in 3rd at 3500rpm's, it only cuts out when I give it a-lot of pedal. If I ease off it when it starts to cut out, it's fine. Try and shift into 4th and it's o.k., till I stomp on it. Still no codes.
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ryanmillay
User
Oct 24, 2011, 10:19 AM
Post #35 of 48
(2593 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Alldata has the TPS sensor test as follows:
Jump the Dark Blue wire and the Black Wire to a volt meter. Reading should be (KOEO) .042 - .054
What I have is .0 but when I rotate the throttle and hold it at W.O.T. it reads 5v and falls slowly to .000 without moving it.
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ryanmillay
User
Oct 24, 2011, 10:20 AM
Post #36 of 48
(2590 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Just test drove it again to give you a better perspective of what exactly is going on. When I'm in 3rd at 3500rpm's, it only cuts out when I give it a-lot of pedal. If I ease off it when it starts to cut out, it's fine. Try and shift into 4th and it's o.k., till I stomp on it. Still no codes.
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Sidom
Veteran
/ Moderator
Oct 24, 2011, 11:50 AM
Post #37 of 48
(2589 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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I'm in & out today so won't be around a whole lot.
The TPS might be ok but by those test results you posted, it's not, but by those results it should've coded so I'm thinking you might have done something wrong or it could be a problem with your equipment.
Just a little background, for as "smart" as comps are they can be pretty dumb sometimes, they can't see outside the box. For systems using 5v refs you will never see .00v or 5.00v as normal readings. their range needs to be inside that box so they can spot a failure. The low side will be somewhere around .40v to .80v & high will be in the range of 4.6v to 4.8v. So if you get a .00v the comp will code for a low input & 5.0v will code high. If .0 & 5.0 were acceptable readings, the comp would never be able to see a failure, even if the signal wire was short to a 12v source because that would be outside the "5v box" & the comp would ignore it.
When you sweep the TPS, what you are looking for is a nice steady rise in voltage as you slowly open the throttle. If it glitches, you might see it jump from 2.74v to 4.68v and then back down to 3.12 as you continue to open the throttle. This could give a different range of drivability problems and usually won't code because the failure is happening inside the "box". If the voltage spike went over 5.0v or down to .00v & then back, then it would code due to going outside the box......
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ryanmillay
User
Oct 24, 2011, 12:27 PM
Post #38 of 48
(2582 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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I totally understand that. I will retest the TPS.
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ryanmillay
User
Oct 25, 2011, 9:41 AM
Post #39 of 48
(2568 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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My friends at the local shop have been helping me so to try and fix this drivability issue, so far (as instructed) I have disconnected the EGR and no change! Disconnected the TAN wire LOOP for setting the timing, no change! Disconnected the O2 sensor and no change. NOT EVEN 1 CODE CAME UP.
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Sidom
Veteran
/ Moderator
Oct 25, 2011, 12:17 PM
Post #40 of 48
(2563 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Well Ryan there is really only so much you can do online......I'm pretty much running out of ideas.... I'm sure they should have an old coil kicking around, toss on a good tester & try that...
I see there are a few other shops down the street from you....Maybe take it over to Sids, the Smog depot or even give Bobs tire a shot......Sometimes a fresh set of eyes can spot something that was missed.....
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ryanmillay
User
Oct 25, 2011, 8:06 PM
Post #41 of 48
(2549 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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So today I saw I still had the new fuel pump layin in the backseat after a week of contimplating all this crap. I put it in and there was a change. I noticed it was the same the first lap around the track and it started to improve as I drove a few laps. I noticed the screen (not the sock on the pump) up inside the pump was somewhat clogged. The new pump doesn't have a screen there, so I left it out. Installed the Sock and new pump and put it back in. The hose that connects the pump to the outlet tube was much larger and one of the plastic clamps was not clamped. The new fuel pump kit comes with a new hose that is smaller and look fuel grade and 2 new clamps. I haven't changed the fuel filter yet because of the volume and the pressure I was getting seemed to be o.k.. Now I have to change it. I'm going to get a glass one I can see through. Because I do a-lot of 4wheeling, I will cover it with some foam padding I'm going to steal off my nieghbors water heater lines. I let ya know after NAPA opens and I take a lap.
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ryanmillay
User
Oct 27, 2011, 11:37 AM
Post #42 of 48
(2535 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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So, I changed the fuel pump, installed a new glass fuel filter. Installed a new Ignition Module. Plugs, Wires, Cap & Rotor. Set the timing PERFECT at 8 deg. adv. and still the same thing........ What are the possibilities of it being the coil? How do I test it? YOUR WAY, Not this stupid confusing Alldata way. The guy at the shop talks so damned fast I forgot half the Sh!t he told me.
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ryanmillay
User
Oct 27, 2011, 3:44 PM
Post #43 of 48
(2526 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Now I changed the Ignition Module and the Coil. SAME CRAP. Only thing left is the Coil Pick Up $67 and the Pressure Regulator $42.
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Sidom
Veteran
/ Moderator
Oct 27, 2011, 7:44 PM
Post #44 of 48
(2519 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Ryan....dude.....Stop throwing parts at your truck!!!! Seriously........... You've already taken this as far as you can go with what you've got. You've spent way more on this than a diag costs & STILL have the same problem...
Ryan it looks like there a few shops up & down the street from you......call around & find out how much they will charge you to look at it before you throw any more parts at it..... ok????
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ryanmillay
User
Oct 27, 2011, 8:17 PM
Post #45 of 48
(2512 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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You ever been to any of the shops up here? You obviously haven't seen my website. no live links Automotive Repair Fraud Help And News.
Puttin in a new Pickup Coil in the morning. Thats all that's left. I'm restoring this truck anyway so throwing new parts at it, doesn't bother me. I just wanna eliminate everything 1 piece at a time!
(This post was edited by Sidom on Oct 27, 2011, 8:47 PM)
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Sidom
Veteran
/ Moderator
Oct 27, 2011, 9:18 PM
Post #46 of 48
(2507 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Granted there are different levels of shops but that pretty much goes with any trade or busness.
This problem probably won't get caught by the low grade ones, they don't invest in training or equipment. They can make a good living on the easy problems & pattern failures but the tough ones elude them, they aren't properly trained to find them.
The shop that will find this problem the 1st time will probably be one of the more expensive shops in town. Reason being, they know the systems, have the proper tools to go thru & diagnose the system and find the problem. In a lot of case this takes time, a lot of time. This is where they can get a bad rap from people who don't understand just how tough it is to keep up with this trade & how complex the systems have become.
All they see is when took their car to Joe blows shop he didn't charge for the diag (all he did was pull codes) & only charged for the repair (P0302, bad plug wire). So Joe's a good guy & they always go there but this lastest problem Joe just can't figure out & has install close to a grand worth of parts with no luck. So now they are forced to go to Auto Tech & these guys (thieves) have the nerve to charge $125 an hour just to look at the car!!!!! They didn't do anything!!! They charged $250 for nothing and then another $75 to patch a wire (I could've done that) granted the car runs fine now but those guys (thieves) really got into the ole wallet for over 3 bills (7 less than Joe but Joe was working not lookin), Joe has never charged to "look" at a car. But then again he doesn't go to any training (google how much those classes cost) or have any high end OE or aftermarket diag equipment (again google)
I haven't looked at your site yet but live links aren't allow, I'll check it out. Everytime I see fraud or rip off I do wonder tho...Yea there are some bad guys out there just like any walk of life, if these are true bad guys then it should be posted on a website & I have no problem with that. But if this is info off an unknowing, uninformed opinion of a legitamate shop, then I do have a problem with that....
Restoring a car is fine but some of this stuff you may never have had to replace but that's your call. If your cool with it that's fine & I really do hope you get it but at this point we really don't know if the problem is electrical or mechanical, I'm guessing electrical but at this point it's just a guess. Let us know when you find a fix...
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ryanmillay
User
Oct 28, 2011, 11:36 AM
Post #47 of 48
(2491 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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Everything on my Blazer was tampered with so I have bee going over every single little detail to ensure I don't have problems when I'm 10 feet deep in snow up here in Big Bear, Ca. The coil and Vacuum Transducer were rattlin' around and needed to be relocated in order to make it more accessible to set the timing. I needed new plugs, wires, cap and rotor to begin with because since I got it, they've never been replaced.
I have found electrical tape (as a sealant) under every single vacuum line on the truck.
I replaced the fuel pump because I had to do one in the snow once, and I refuse to go through that crap again. It needed a new fuel filter anyway so I modified that in the process to ensure a visual inspection point for pressure and fuel. Plus it looks pretty cool. As for the Ignition Module, Yeah, The #$%^&%$ at NAPA suckered me into that with his bullSh!t story about his 89 Blazer he had and it's still driving around Big Bear crap. I was on my wits end at that point. I have done my own research and my boss is telling me it's a good idea to pull the O2 sensor and see if the CAT is plugged up. When I smogged it, the tech pinched off the EVAP line to lower NOX and HC's and I just found that out 5 minutes ago. Had I known that, the simple fact of knowing that HC's are unburned fuel and will clog the CAT are a simple deduction. I will keep ya' posted. Thank you for all of your help, It's very much appreciated. I will give ya some good reviews on my website deleted
(This post was edited by Hammer Time on Oct 28, 2011, 11:38 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 28, 2011, 11:38 AM
Post #48 of 48
(2485 views)
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Re: 1988 Chevy Blazer S-10 4x4 CODES?
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You have just elevated to spammer
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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