GS400Star

I could use some help on where to look first. I just went out to my car for a run to the store but when I went to start it and turned on for about 2 seconds and then turned off. I tried to start it again but it just churns over but never starts.

A little history: Car has approx. 150,000 miles, I replaced the plugs about 6 months ago and its way overdue for a tune up. I noticed a couple times over the last year that after coming off the highway and stopping the rpms would go down a little and the car woudl stutter just for a couple seconds and then back to normal. I dont know if there is any correlation between that and whatever is wrong now but I am trying to disclose everything I know. The battery is pretty new and all the lights and radio seem to be working fine so I dont think its related to the battery.

Can anyone point me in the right direction on where to look/check first?

Thanks

URWTDRM

Starter, fuel pump, fuel filter :whoknows:

jcat_350

fuel pump, fuel filter, injectors. It's definitely a fuel related problem. Also check to make sure the throttle body and maf are clean while youre at it.

GS400Star

ok...thanks....I will check the DIY section to see if there is a MAF/throttle body cleaning write up. Is it as easy as just getting some MAF cleaner and spraying it into the MAF and throttle body?

I was thinking about getting a OBD2 error code reader (cant remember what they are called) and checking for error codes.

VipDout

iTrader: (4)

you can read my thread but mine still doesn't start ;(

GS400Star

Thanks for the lead to your thread. I read the whole thing and there is some good info in there. I hope I dont have your troubles figuring out the problem. Good luck with yours.

VipDout

iTrader: (4)

Good luck with yours ...... I had luck with it starting again and then dieing asap ........ still not sure and its all packed up for the car to go to the shop ..

Heres a quick list of everything that was done for my car in the month is was down 12/28/2008

Spark plugs changed with Irridium
New 850 ccas Interstate battery
Tested Alternator passed 3 times
Checked TPS (in range)
Checked Crank position sensor (in range)
Checked Crank position sensor (in range)
Exchanged Throttle body and found it had a (bad motor) ?
Checked the ECM trouble shooting and works fine
Checked all wires to the Ignition switch and ECM and EFI relay and readings good
Ignition fuse good
All Fuses good
Checked almost Complete Harness No breaks
Checked one coilpack test (low spark)
changed out to a new Serpentine belt


Many more things but those are relevant to this issue and still no luck , Best of luck man . when I find out whats going on I will have it posted up for 99 Gs400 owners

Btw I am about 150k too