Im having an issue with my car. It occasionally has trouble starting. When I turn the key the RPMs go up, groans and shakes a little as it struggles to stabalize and then konks out. I have to repeat this several times to get my car started when it occurs - each time having to give it gas to get up. But once it stabalizes, it has no problem at all holding an 800 rpm reading with zero rpms movement. The rpms dont jump around while the car is running or moving. This happens about 10% of the time, totally random, and no check engine light. It's getting undependable to start, as well as frustrating, the problem is definetly getting worse. Any suggestions on what this might be?

When someone says "air flow problem" what does that mean, or what would I have to replace??

Also, I just got a new battery and a fuel system cleaning in December.

thanks

10/9/2006 8:58:06 PM

YEAR, MAKE, AND GODDAM MODEL

[Edited on October 9, 2006 at 9:02 PM. Reason : all cars are not created equal...]

10/9/2006 9:02:13 PM

idle control valve?

10/9/2006 9:09:28 PM

99 ford mustang

10/9/2006 9:20:01 PM

What Igor said. Idle air control solenoid.

Could be fuel pump losing prime as well.

[Edited on October 9, 2006 at 9:21 PM. Reason : shizz]

10/9/2006 9:20:42 PM

it cant be the idle air control - i had that replaced about 2 years ago - plus there is zero fluctuation in RPMs once it is started and stabilized

10/9/2006 9:53:45 PM

see my second answer. You need to hook up a fuel pressure gauge and see what the fuck is happening.

BTW, it don't make a shit if you replaced it two months ago. Shit does go bad again, and there are such things as defective parts.

10/9/2006 9:56:46 PM

two years ago is kinda long time in car part years. it could be the same thing.

10/10/2006 3:24:29 AM

could be iac, egr, fuel filter, fuel pump, injectors, coils, somethin like that aint easy to diagnose on the web, especially an intermittant problem

10/10/2006 12:28:24 PM

how do you check fuel pressure?

How often does someone need to change a fuel filter?

10/12/2006 12:05:17 AM