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cmigs
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Nov 12, 2012, 7:03 PM
Post #1 of 20
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99 express wont start
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went to start it, and it would not. Thought it may be gas issue add 2 gal aprox still nothing. was low not to sure about fuel gauge, I do have spark out of distributor to plug lead. tried starting fluid into air cleaner box, after filter.still nothing. I have basic tools. Please help if you can
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 12, 2012, 7:27 PM
Post #2 of 20
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Re: 99 express wont start
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In tank fuel pumps are cooled and lubricated by the fuel in the tank. When you run a car out of gas, it pumps a lot of air through the pump which overheats it and causes some severe wear and many times, failure when they cool off.
You will need to use a fuel pressure gauge to verify this
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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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cmigs
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Nov 12, 2012, 7:41 PM
Post #3 of 20
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Re: 99 express wont start
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thank you for the reply. I knew that would be the first thing that I would be told as i have been looking at other similar posts. I can try to borrow one from auto store or just buy one as I work on all my autos. how much do you think a good pressure tester costs
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Hammer Time
Ultimate Carjunky
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Nov 12, 2012, 7:44 PM
Post #4 of 20
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Re: 99 express wont start
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A good one ---------- over $400
One that will get the job done and doesn't come with multi vehicle adapters ------------- $50 to $100
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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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Discretesignals
Ultimate Carjunky
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Nov 12, 2012, 7:51 PM
Post #5 of 20
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Re: 99 express wont start
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Do you even hear the pump run for a few seconds when you turn the ignition on?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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cmigs
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Nov 12, 2012, 7:56 PM
Post #6 of 20
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Re: 99 express wont start
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ok were is the test port on this van, this is my worst fear on this van, working on this motor,shoe horned under the dash and hood.Plus it is dark when i get out of work now. I do have plenty of trouble lights
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Hammer Time
Ultimate Carjunky
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Nov 12, 2012, 7:58 PM
Post #7 of 20
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Re: 99 express wont start
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Couldn't tell you since you never posted the engine size.
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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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cmigs
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Nov 12, 2012, 7:59 PM
Post #8 of 20
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Re: 99 express wont start
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i dont think i ever heard it run ever. I do hear a noise after cranking for a few seconds that sounds like a fuel pump
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cmigs
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Nov 12, 2012, 8:01 PM
Post #9 of 20
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Re: 99 express wont start
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thats a good ? exp3500 vortec 8 cly will go out and find out
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cmigs
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Nov 12, 2012, 8:07 PM
Post #10 of 20
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Re: 99 express wont start
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5.7 L
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Hammer Time
Ultimate Carjunky
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Nov 12, 2012, 8:11 PM
Post #11 of 20
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Re: 99 express wont start
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The service port should be on the incoming fuel line at the back edge of the engine. You need to pull off the engine cover.
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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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cmigs
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Nov 12, 2012, 8:21 PM
Post #12 of 20
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Re: 99 express wont start
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thanks I did get the cover off to check spark at distributor. I will try to get fuel tester tomorrow but have to work tomorrow nite. cant test until wednesday evening
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cmigs
User
Nov 12, 2012, 8:24 PM
Post #13 of 20
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Re: 99 express wont start
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I think i don't hear it as i just hear the buzzer when i put the key in and start it normally
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Discretesignals
Ultimate Carjunky
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Nov 12, 2012, 8:28 PM
Post #14 of 20
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Re: 99 express wont start
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If you turn the key to the run position (not start), you should hear the pump whine/hum for a few seconds. Good place to listen is with your ear up against the tank while someone cycles the key on. If you don't hear anything, more than likely the pump isn't running. Sometimes (not always) you can bang on the bottom of the tank while someone cranks the engine. If the engine starts while your smacking on the tank, the pump is the culprit. If not, you need to do some more fuel pump troubleshooting.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Nov 12, 2012, 8:29 PM)
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cmigs
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Nov 12, 2012, 8:36 PM
Post #15 of 20
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Re: 99 express wont start
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just came in from checking it does run and i get fuel out of the test port but without gauge that tells nothing as i have read on other posts of both of you guys. buy the way both of you are awesome
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Discretesignals
Ultimate Carjunky
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Nov 12, 2012, 8:40 PM
Post #16 of 20
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Re: 99 express wont start
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Yep, you need to check fuel pressure as HT pointed out. Needs more than 55 psi to open the injector poppets as you may have read.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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cmigs
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Nov 12, 2012, 8:43 PM
Post #17 of 20
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Re: 99 express wont start
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thanks again will get back when i test for pressure
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cmigs
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Nov 14, 2012, 5:04 PM
Post #18 of 20
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Re: 99 express wont start
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so i tested the pressure got 60 psi, then turned the key and it started right up, a little rough but it cleared right up. I did notice that the fuel pressure would not hold at 60 psi it droped to 40 in about 5 sec. this was before running, when it runs it stayed at 60. ????????? now i am worired if this will happen again. any advice on this
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Discretesignals
Ultimate Carjunky
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Nov 14, 2012, 5:09 PM
Post #19 of 20
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Re: 99 express wont start
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The rest pressure shouldn't drop like that. Could be a bad check valve in the fuel pump causing the fuel to drain back to the tank and cause delayed starting.
That is the problem with intermittent issues, you can't figure out what is wrong if everything is working. We get those in the shop a whole lot and they aren't getting any easier. Guess next time it does that have your fuel pressure gauge handy.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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cmigs
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Nov 14, 2012, 5:19 PM
Post #20 of 20
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Re: 99 express wont start
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yea I hear ya i am a heat tech.
I know all to well about cant fix it if it ain't broke. As far as the pressure gauge it is on loan till monday. I will continue to follow up on this thread as i feel this is not over thanks a million for all your help. THIS SITE IS DA BOMB
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