Runs bad after warm up

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Jul 7, 2011 | 03:54 PM

TomV

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Runs bad after warm up

I have a 91 firebird v6 3.1, it runs good when I first start the car but after it warms up it starts running bad and then dies. Any ideas?

Jul 7, 2011 | 11:42 PM

IROCyou86

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Joined: Apr 2010

Posts: 35

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From: Sunnyvale, CA

Car: 1983 Z28

Engine: 305 LG4 soon to be FRANKENSTEIN L69

Transmission: T-5 NWC

Axle/Gears: 3.23

Re: Runs bad after warm up

fuel pump? Check fuel pressure.

Jul 7, 2011 | 11:45 PM

406c.i.RS

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Joined: Jul 2011

Posts: 9

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From: South TN

Car: 92 rs

Engine: 409 c.i. sbc

Transmission: 700r4

Axle/Gears: 10 bolt 4.11

Re: Runs bad after warm up

could be coolant temp related? closed loop issue?

Jul 7, 2011 | 11:58 PM

southbay08

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Joined: Nov 2008

Posts: 1,528

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From: Rockville Centre, NY

Re: Runs bad after warm up

check the ohms on the injectors hot and cold.

Jul 11, 2011 | 03:53 PM

TomV

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Joined: Jul 2011

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Re: Runs bad after warm up

I checked the fuel presure and it was 5psi, checked the filter and it is new and clear.
Now it will only run real bad all the time so I think it's the fuel pump.

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