94 SSEI refuses to stay running.

94GreenMachine · Post by **94GreenMachine** » Fri Sep 30, 2016 11:33 pm

I've got a problem with my 94 SSEi. The engine won't stay running, the fuel pump will cycle on after I turn the key to the run position, it will start then die after a few seconds. I replaced the fuel pump and fuel filter soon after. It ran flawlessly for the 5 years I've owned it. Now it won't stay running. I replaced broken vacuum lines and spark plugs. On a whim I sprayed starting fluid in and it stayed running as long as I kept the fluid going in. Halp! :(

redfury · Post by **redfury** » Fri Sep 30, 2016 11:45 pm

Sounds like you have a fuel delivery problem. Have you replaced the fuel filter at all? I'd check your fuel pressure as well.

94GreenMachine · Post by **94GreenMachine** » Sat Oct 01, 2016 12:13 am

Yes, I replaced the fuel filter at the same time w/ the new fuel pump. I'm going to get a fuel pressure gauge and see what's going on.

MKMike · Post by **MKMike** » Sat Oct 01, 2016 11:44 am

When my car did this it was a bad MAF sensor.
The car would crank and sometimes start but then die within seconds, no matter what I did with the gas pedal.
There were no codes set.
Eventually, I replaced the MAF.

You can try cleaning the MAF but be sure to use MAF sensor cleaner because other cleaners leave a residue that makes the MAF not work properly.
Some people are able to isolate a MAF caused stalling issue by unplugging the MAF connector and then starting the car.

Not sure why but this didn't help my car but replacing the MAF worked.

Hitachi made the original MAF and is a quality brand.
Some people get an original MAF from a junkyard.
Other aftermarket MAF sensors, regardless of price, have a high failure rate.

Rockauto has the Hitachi MAF for around $85, IIRC.
Use the code they provide in their post on the Pontiac Bonneville Club Vendor's forum, if you buy parts from Rockauto.

Post by **J Wikoff** » Sat Oct 01, 2016 1:23 pm

I was going to suggest the maf also. Try unplugging it and starting. Also pull the vacuum line off the fuel pressure regulator and see if there's a strong smell of gas in the line.

94GreenMachine · Post by **94GreenMachine** » Sat Oct 01, 2016 2:48 pm

J Wikoff wrote:I was going to suggest the maf also. Try unplugging it and starting. Also pull the vacuum line off the fuel pressure regulator and see if there's a strong smell of gas in the line.

I've unplugged the MAF and it doesn't make a difference,it will start up just fine and then the engine will turn itself off. I'll look for the fuel pressure regulator and get back with you guys.

redfury · Post by **redfury** » Sat Oct 01, 2016 5:16 pm

When I got my Bonneville it would start right up and run for a while and eventually it would die. However, when I finally got around to replacing the lower intake manifold gaskets and got it on the road, I immediately got a MAF code. It stumbled under load pretty badly. A replacement MAF did the trick.

MKMike · Post by **MKMike** » Sat Oct 01, 2016 8:28 pm

94GreenMachine wrote:
I've unplugged the MAF and it doesn't make a difference,it will start up just fine and then the engine will turn itself off. I'll look for the fuel pressure regulator and get back with you guys.

That was my experience as well.
The MAF was bad but did not set any codes nor would it stay running.

Of course, checking the FPR and fuel pressure is not a bad idea.
You can also check all the vacuum lines to make sure none have cracked or broken.

PontiacBonnevilleClub.com

PontiacBonnevilleClub.com

94 SSEI refuses to stay running.

94 SSEI refuses to stay running.

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