I'm Baffled..Car starting problems

MrGame · Feb 28, 2007

Well now that i've fixed the cam position sensor and reset the code in the computer, the car won't start unless I'm hitting the gas and if I don't it turns and then 'pops' and shuts off. After reading the other thread, I think it may be the IAC, but it stays running after I let off the gas if i can get it to start. Any ideas?

DTNODYA · Mar 1, 2007

Have you checked your fuel pressure to make sure that your pump is working correctly? Just a thought ....

the98stang · Mar 1, 2007

Clogged fuel filter?

MrGame · Mar 1, 2007

DTNODYA said:
Have you checked your fuel pressure to make sure that your pump is working correctly? Just a thought ....

how do you check your fuel pressure? because I had my suspicions about that too

LaserRed01GT · Mar 1, 2007

Mr Game, I don't know about your previous thread, but by any chance were you getting codes P0340 or P0344?

The CMP (camshaft postion sensor) is used to correctly time the firing (pulsing) of the fuel injectors. If you have the variable reluctance type CMP sensor(2 wire non gear driven), and the CMP sensor did not correctly pick up the cylinder sequence right away, the PCM will abandon the sequential injector firing sequence and fall back on a batch fire injector table. This means the injector is just blindly fired once for every 2 revolutions of the crank. This can cause starting and running problems obviously. The COP's are also fired by using the CMP input as part of the ignition timing strategy.

MrGame · Mar 2, 2007

LaserRed01GT said:
Mr Game, I don't know about your previous thread, but by any chance were you getting codes P0340 or P0344?

The CMP (camshaft postion sensor) is used to correctly time the firing (pulsing) of the fuel injectors. If you have the variable reluctance type CMP sensor(2 wire non gear driven), and the CMP sensor did not correctly pick up the cylinder sequence right away, the PCM will abandon the sequential injector firing sequence and fall back on a batch fire injector table. This means the injector is just blindly fired once for every 2 revolutions of the crank. This can cause starting and running problems obviously. The COP's are also fired by using the CMP input as part of the ignition timing strategy.

it was definately one of those two codes laserred you're the man! can that problem be fixed though? i took the car to the dealer because I got frustrated..I'm learning how to fix cars, but i'm not quite an A+ mechanic yet

LaserRed01GT · Mar 2, 2007

MrGame said:
it was definately one of those two codes laserred you're the man! can that problem be fixed though? i took the car to the dealer because I got frustrated..I'm learning how to fix cars, but i'm not quite an A+ mechanic yet

Based upon my experience, 9 times out of 10, those two codes point to a bad alternator, or an alternator on the way out. The low voltage will trigger the CMP codes, but there is likely nothing wrong with the CMP sesnor at all.

Brute03 · Mar 8, 2007

+1

i remember that P0340 code by heart now, it gave me such a headache. it took me a month and two cmp sensors to figure out that it was the alternator

I'm Baffled..Car starting problems

MrGame

Member

DTNODYA

Member

the98stang

Active Member

MrGame

Member

LaserRed01GT

Banned

MrGame

Member

LaserRed01GT

Banned

Brute03

Member

Similar threads

I'm Baffled..Car starting problems

Member

Member

Active Member

Member

Banned

Member

Banned

Member

Similar threads

Privacy & Transparency

Privacy & Transparency