95 cavalier no fuel pressure - Car 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

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...

1999 Grand Caravan Sport not starting.

Hi. I'm new here. I hope someone can hel...

95 cavalier no fuel pressure

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Car Troubleshooting

LM88
New User

Feb 18, 2008, 2:10 PM

Post #1 of 3 (3540 views)

95 cavalier no fuel pressure	Sign In

95 cavalier 2.2L. vehicle has spark & injector pulse...NO FUEL PRESSURE.. No power to the pump. I've scanned the vehicle & have no codes. Fuel pump relay has power only in the start/run position. It only has power on the fused circuit. I'm not getting a signal from the ecm to turn the pump on. I just tried a reman. ecm today....samething... not commanding the pump to come on.

(This post was edited by LM88 on Feb 18, 2008, 2:14 PM)

Double J
Veteran / Moderator
Double J profile image

Feb 19, 2008, 2:48 PM

Post #2 of 3 (3528 views)

Re: 95 cavalier no fuel pressure	Sign In

When the ignition lock cylinder is turned to "RUN" position, the fuel pump relay activates the electric fuel pump for approximately two seconds to prime the injectors. If the PCM does not receive reference pulses from the distributor/crankshaft sensor after this time, the PCM opens the fuel pump relay ground circuit. The relay will reactivate the fuel pump when the PCM receives distributor/crankshaft sensor reference pulses or when oil pressure raises.

Guest
Anonymous Poster

Oct 26, 2008, 5:51 PM

Post #3 of 3 (3472 views)

Re: 95 cavalier no fuel pressure	Sign In

Hi,
Hopefully you have the problem fixed by now.
Try the ignition switch! I had the same problem with a 95 Sunfire 2.2L. Tried a different ECM, Tracked wiring, ect. Powered the fuel pump relay with 12v and car would start and run. (Car would remain running after starting even after the jumper was removed from the fuel pump relay). Tracked the power sourse thats supplied the ECM with the signal, to the Ignition Switch. ie. When the ignition switch is turned on, it tells the ECM to supply power to the fuel pump relay for a few seconds. This signal was not coming from the ignition switch! Changed ignition switch and cured problem. Also be aware that there is a recall on the ignition switch to starter wiring. There was too much current going through the ignition switch during starting, causing ignition switch failure, so they had a recall to install a relay in the system. If you have the relay, you should be able to follow the cranking wire from the starter to a relay. The relay was installed not far from the starter in the engine compartment. Mine was attached to the engine coolant electric fan frame. Good luck.

Search for (options) Privacy Sitemap