88' Cutlass Supreme wont stay running - Engine Troubleshooting


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88' Cutlass Supreme wont stay running

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Timw2003
New User

Apr 30, 2009, 2:07 PM

Post #1 of 4 (2899 views)

88' Cutlass Supreme wont stay running	Sign In

My cutlass has been dieing randomly over the past few months. And stupid me didnt fix the problem then. When i would take it up hills it would act like it would die, and sometimes would. Ive changed the plugs, fuel filter, O2 sensor, M.A.P. sensor, and the Airflow sensor. Ive also used fuel injector cleaner(the expensive one, $22 a bottle). The engine starts but runs a little ragged. Whenever i hit the gas the slightest bit the car chokes and dies. I'm hoping that the injectors arent needing to be replaced. Any tips or knowledge on how to fix the problem, or and idea whats wrong? thanks

Double J
Veteran / Moderator
Double J profile image

Apr 30, 2009, 2:56 PM

Post #2 of 4 (2898 views)

Re: 88' Cutlass Supreme wont stay running	Sign In

Take a Fuel Pressure Reading using a Fuel Pressure Gauge.

Low Fuel Pressure from a Weak Fuel pump could be causing this.

Timw2003
New User

May 2, 2009, 11:12 AM

Post #3 of 4 (2882 views)

Re: 88' Cutlass Supreme wont stay running	Sign In

i do not know if this is normal or not, but i pulled back the throttle manually, and when i release it i hear a clunking noise. Sounds kinda like dropping a plastic cup. Is this normal?

flgmtech1
User

May 2, 2009, 1:19 PM

Post #4 of 4 (2871 views)

Re: 88' Cutlass Supreme wont stay running	Sign In

Yes the noise you are hearing is the throttle plate in the throttle body closing metal to metal contact. this is normal.
However, as previously advised you need to obtain a true fuel pressure reading especially loaded, i.e., under load as static pressure may be correct but under engine load the volume drops, so you may have pressure but not enough flow or volume.
There have also been cases with the 86-90 Oldsmobiles having the internal baffles inside the fuel tank cracking and causing issues with pump strainers and senders alike.

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