98 240sx Cold Start/Idle Prob.

[DustinInDFW]

Hey guys, I have an all stock 99K mile 5-speed 98 LE and when the engine is cold the car is a biatch to start You pretty much have to floor it for several cranks and eventually it takes the gas and starts. Then it idles really funky and after a few seconds it is fine. Starts fine if the motor is warm and runs like a champ all the time I have replaced the temp sender as recomended but that did not help.

TIA,

Dustin

[DustinInDFW]

HELP! The colder it gets outside, the harder it is to start

[p00t]

anyway you could look at or borrow a FSM? there is a whole diagnosis section in there for cold start trouble.... wish i had mine with me i could help ya out

[NISTECH]

try cleaning the throttle body first. if it has black carbon deposits around the throttle plate it can choke off some of the air causeing it not to start easily during cold enrichment. also if your base idle is on the low side it can cause a hard start when cold. these are the most common causes to hard starts when cold out as you have described. more rare cause is a incorrect coolant temp sensor signal due to a bad sensor.

[DustinInDFW]

Cool. I'll check the TB and idle

What is a FSM?

[NISTECH]

FactoryServiceManual

[DustinInDFW]

Thanks!;)