1994 Cadillac Concours Car acts like it isn't getting fuel

JAMESL37SCUBA

MEMBER
1994 CADILLAC DEVILLE CONCOURS
V8
FWD
AUTOMATIC
157,000 MILES

I have 94 Cadillac Deville Concours. It has the 4.6 liter Northstar v-8. The runs fine while the engine is cool. The car seems to have a fuel problem after it is warm, it sputters and hesitates and sometimes dies. This happens with a full tank of fuel also. We have had the computer replaced, crank senors and cam sensors, and the coil packs replaced. What is the pressure supposed to be from the fuel pump?Any suggestions on what else might be causing the problem?

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,645 POSTS

Hi:
Yes, the fuel pump should be checked for pressure and volume. However, has anyone checked the map sensor? If it has a low voltage problem, it could have an affect on engine performance.

Let me know what you find.
Joe

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Tuesday, November 18th, 2008 AT 8:09 AM

BEAR9739

MEMBER
1 POST

When your catallactic converter is bad your car will act the same way, runs fine till you build up pressure cost me 500 at a cad. Dealer had same thing happen on my pickup cut a hole in front of converter and took right off, tem. Fix. Before it got really bad I could pull over, turn off car & let the pressure blead off & run till it built back up. If you block the exhaust a car will not run.

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Saturday, June 25th, 2022 AT 2:46 PM

KASEKENNY

MECHANIC
18,907 POSTS

That is great info. Thanks for adding to this post.

I am adding a little more info just to help with what you are talking about.

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please let us know if we can help you in the future. Thanks

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Saturday, June 25th, 2022 AT 5:30 PM