87 IROC-Z 350 T.P.I.
I have had previous mass air flow problems but I thought I had solved them (no Engine codes anymore/car runs fine) sometimes when its really hot outside and I've been driving all day. My car won't Idle when I try to start it up. It just dies. I have to wait for it to cool down to start it but then it runs fine again. What the hell is going on?

 

Does your car start up fine, then idle irratically before dying? If so, I could be fuel pump failure. listen to see if your fuel pump cycles on while taking fuel pressure readings from your schrader valve on the fuel rail...I had the same problem a year ago. Hope this helps

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1990 Firebird Formula 350 speed density TPI; K&N, air foil, throttlebody coolant bypass, underdrive pullies, MSD 6AL, MSD HEI coil, 8.8mm wires, adjustable fuel pressure regulator, Hypertech Thermomaster chip, 160* thermostat, fan switch, B&M stage 2 shift kit, Edelbrock 1&5/8 headers, gutted dual cats, Flowmaster 80 series muffler, 3.73 posi rear end

 

when's the last time you changed the fuel filter?

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1991 banditt2 #130 of 600
Project 350 TPI Banditt II
http://www.street-dawg-racing.cityslide.com
http://discussion-board.com/GreaterC...dyAssociation/
http://www.cincyspeed.com/

 

Yeah, the first thing I would check would be the fuel pump. They often begin to show signs of death that way. As the pump heats up from pumping, and the fuel recirculating through the rail and back to the tank keeps getting hotter and hotter from engine heat the weak pump finally overheats and gives up.
Check your fuel pressure and see what's up.

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Tracy /AKA IROCKZ4me
'86 IROC-Z Camaro
"Cogito ergo zoom"

• 355 cid
• AFR heads
• Arizona Speed & Marine hydraulic roller cam w/ AFR hydra-rev kit
• modified SLP runners
• TRW forged pistons/ceramic coated
• fully balanced
• Edelbrock headers/ceramic coated
• SLP cat-back
• Paxton supercharger
• Nitrous Express nitrous oxide

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