01 Bonne SE hard starts and randomly dies

[DanJ]

My girlfriends 2001 Bonne SE is having all sorts of problems. Car doesn't want to start unless they pump the gas pedal (on an EFI car, I know) and then will randomly die while cruising or idling. Hooked it up to HPT and fuel trims would go to -20 and the O2 would stop oscillating and sit at 22 for periods of time making me believe the car is running stupid rich. When it dies the voltage is still at 14.3. Any ideas? Car has new plugs wires and battery.

Click to read more...

 

[Eagle]

Fuel pump! Check PSI @ the rail yet?

 

[DanJ]

Yea yea yea, I know. Haven't gotten around to it but if it's running pig rich I would think its getting too much fuel if anything.

 

[Riski]

Check the flux capacitor...

 

[02BlueGT]

Maf sensor.... Hard starts, dieing while running, swap in the one from your car to test, just unplugging it doesn't always work.... (it's free and easy so try it first).. And my bad maf never threw a maf code (threw some lean and rich codes)

Also pull the vac line off the fuel pressure regulator, check for fluid (or a strong gas smell) a cracked diaphragm in the FPR will cause a constant rich.......

Pressing the gas on an EFI car during start up causes a LEAN start command from the pcm... your def getting too much fuel

 

[daturbosix]

bring it by and ill take a look at it.

 

[PANDA]

Damn, I didn't know the GF had a Bonneville also... I would check the MAF.

 

[DanJ]

Pulled the vac line off the FPR this morning, could see and smell gas. Replaced today and all is well. Thanks for the input.

 

[02BlueGT]

Also pull the vac line off the fuel pressure regulator, check for fluid (or a strong gas smell) a cracked diaphragm in the FPR will cause a constant rich.......

Pressing the gas on an EFI car during start up causes a LEAN start command from the pcm... your def getting too much fuel

Pulled the vac line off the FPR this morning, could see and smell gas. Replaced today and all is well. Thanks for the input.

<----This guy was right (for once)!! :bario::bario: