PDA

View Full Version : anyone help


mikekavan
12-13-2006, 07:10 PM
havin some trouble with the grand am. pissin me off is more like it.
i have a 3300 v6 and it runs great. except when the outside temp drops to the thirties the son of a buck will not start. it will crank and crank no luck on the starting. as soon as it warms back up to the forties or fifties the dumb thing will kick right over and roar to life. like nothing was ever the matter.
outside temp has not been cooperating with the diagnosis but have no leads. no engine codes on the handheld scanner. spark to all. fuel pressure. power to the starter obviously. any one have anything close happen and how the heck do i fix it. leads always helpful i just dont want to start throwing parts at it, i want some solid leads before i start replacing stuff. gets too costly throwing ecm parts and sensors on.

Jchiasson
12-13-2006, 07:34 PM
I've run in to this previously with an old 2.9 ford v6, gap on the plugs was so out of whack it would not start in the cold. I'm assuming when this happens you pulled a plug and checked for spark, and noticed the plug to be wet after you pulled it. Also what voltage does your battery drop to when starting, I've seen where voltage drop on a weak battery when starting drops so low the electronics just won't work.

Hopefully this will at least give you a start without throwing parts at it.

mikekavan
12-13-2006, 07:51 PM
battery is new and is reading fine on the volts it still registers in the green on the load tester.
this has been happening the whole time i have owned the car and it never stays cold enough to give me enough time to get to the bottom of it
however this is the first winter it has been this bad.

pokesmot
01-11-2007, 05:20 PM
things to check:

- ECT temperature sender (is temp accurate?)
- TP sensor (does it read from 0% - 100% as you use the accelerator?)

-Spark plug gap (should be 0.06 thousands of an inch IIRC)
-Ignition module connections / ground (the platform that the module mounts to often corrodes causing a bad ground problem)

-Fuel pressure / pump (make sure the fuel pump is working, try banging on the fuel tank when its cold out while cranking to see if this makes a difference)

-IAC (idle air control valve; if its stuck open)