Strange problem with engine starting
 

Hi
For some time I have a problem with engine starting. When the engine is cold in the morning, for example, the engine starts right away without any problems, but if you take a ride a few miles and then try to start the engine again the starter motor spins a long time. When the finally ignites then the engine speed increases up to 2000 rpm and then slowly drops to 1100 rpm and the car is ready to drive. I replaced the spark plugs and battery but it did not help. I've read a bit about it and think that the issue can be caused by damage one of several engine sensors (MAP, coolant or crankshaft), but I do not know exactly how to find a faulty one. Any ideas? I will be grateful for your help.

Try cleaning the idle control valve,guide on here that could relate to the high revs and bad starting.

I will try to do this tomorrow and will see ;) Thanks for your help :y:

everything has been cleared with the inlet manifold but the problem remained. After cleaning the idle control valve and inlet manifold, the engine very hard to start, the engine speed rippling but after a while everything calmed down and the engine ran normal until warms up. The problem is still the same. It seems to me that the idle control valve is broken but I'm not 100% sure and do not want to waste money to buy new if this can be efficient.

Strange problem with engine starting
 

everything has been cleared with the inlet manifold but the problem remained. After cleaning the idle control valve and inlet manifold, the engine very hard to start, the engine speed rippling but after a while everything calmed down and the engine ran normal until warms up. The problem is still the same. It seems to me that the idle control valve is broken but I'm not 100% sure and do not want to waste money to buy new if this can be efficient.

sorry for my english guys but I don't know how to edit a quote :wall: anyway everything has been cleared the inlet manifold and idle control valve but the problem remained. After cleaning the idle control valve and inlet manifold, the engine started very hard and RPM was rippling but after a while everything calmed down and the engine ran normal until when was warmed up. The problem is still the same. It seems to me that the idle control valve is broken but I'm not 100% sure and do not want to waste money to buy new if this one can be ok. Any ideas ?

The idle control valve has a moving part that pulses in and out,does it move freely?

yes from right to left side not from up to down. It's easy to feel pretty much play on it.

found that the coolant temperature sensor is faulty. I replaced idle control valve and coolant sensor and engine no longer presents a problems with the start-up. Thanks anyway.