94 Pontiac Missing - Engine Troubleshooting


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Subaru Forester white smoke at start up

I own a 2010 Subaru Forester X Premium. ...

1989 toyota pickup 3.0 crank no start

I have a 1989 toyota pickup 3.0 crank no...

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

03 alero no low speed blower

Good day everyone, I have a 2003 Olds a...

04 Chevy 2500hd tail light issues

Help!!! I have changed my combo switch...

94 Pontiac Missing

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

CMQ
User

Feb 19, 2014, 9:01 AM

Post #1 of 3 (1135 views)

94 Pontiac Missing	Sign In

I have a 94 Pontiac with the 3.8L. Had some problems with the ignition control module and coil packs a few months back. Replaced both and fixed the problem for the most part. Plug wires and wiring were all good as well. Missed every once in a while but not constant like it was. Now it's starting to miss again. It's not as drastic as it was the first time. Very subtle almost like driving on a rough road. It doesn't miss if it's in park or neutral and idling or if you rev the motor up. It only does it from around 45mph and up and only if I'm accelerating. Possibly injector or spark plug related?

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 19, 2014, 9:11 AM

Post #2 of 3 (1129 views)

Re: 94 Pontiac Missing	Sign In

Plugs and wiring: How did you know they are good? Yes take a look. Are you sure this is engine at all?

Try duplicating roughness/missing just in drive brakes on hard duplicating the load just a bit - don't go nuts and in a safe place. If nothing it may not be engine at all,

T

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Feb 19, 2014, 9:35 AM

Post #3 of 3 (1121 views)

Re: 94 Pontiac Missing	Sign In

Yes, it could be either of those but the first step is identifying which cylinder is doing it and that won't be easy because OBD1 doesn't track misfires.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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.

Search for (options) Privacy Sitemap