Have changed the air box top no difference run smooth as silk at normal temp
Cold starting misfires can often be caused by either tired high tension spark plug leads or ignition coil packs. If replacing leads, then replace with a full, new set. Coils can be changed individually, but it is often the case that if one has failed, then the others aren't far behind. Some cars have individual coil packs on each spark plug. Some cars have a single pack for all plugs and some have coil packs which may control two or more plugs.
To check for a misfire (ignition failure) follow these steps:
(Cold start) (Use a pair of insulated pliers)
1) Start the vehicle
2) When the vehicle starts misfiring, disconnect plug leads or coil pack connections one at a time. If the vehicle idles even more roughly, then that plug or pack should be considered fine.
Replug each connection before disconnecting the next one. Once you disconnect a plug lead or coil pack connection and find no difference in poor engine running, then you have likely found the offending cylinder. Check the spark plug condition, lead and/or coil condition and connections on that cylinder.
3) Replace components as necessary.
The car wont start at all i have checked no spark at the plugs or comming from the coil pack .I have also changed the coil pack still no spark.
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SOURCE: buick lesabre nightmare 2
SOURCE: high idling at low temp.
Hi,
Offhand, yes this would be normal. The high idle is brought about by the auto choke whose purpose is to hasten the reaching of operating temperature of the engine. The fact that the idle RPM goes down after some time is a good indicator, it tells us that the auto choke is working.
Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.
SOURCE: Check engine light comes on temporarily - engine chuggs at idle
Before changing you pcm try cleaning your egr valve. remove the valve and see if its stuck in the open position if so use a small pick to clean around the spring.
SOURCE: Temperature gauge problem on a 1987 Samurai
There's two sending units in the intake. The little on with single prong at the t-stat housing is for the guage and the bigger one plastic connector is for ecm.
Your signal is getting grounded somewhere.
SOURCE: Rough Idling, start-up early morning, until engine heats-up
this may be a sticking air flue meter take a matchstick .and push it into the hose this will let more air in if this works change the air flue meter
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