P38 4.6 goes to 1800 rpm after starting

mjb.thomassen · Tuesday at 13:54

After starting 1800 rpm and stops when putting in gear.
After 3 times it finds the right rpm and it drives ok.
Maf sensor is ok and bdp sensor also

kermit_rr · Tuesday at 14:25

How long does it start at 1800 rpm? The idle control valve raises the revs on a cold start.
Make sure it's plugged in properly and not dirty/damaged connector

mjb.thomassen · Tuesday at 15:01

Maybe 15 to 20 seconds. I never wait that long I put it in gear and try to drive sometimes it works , most of the times after thee times.when the car is in the hot sun it takes longer

marjon · Tuesday at 15:27

Firstly I don't know, But what year is it? Gems or Thor?

mjb.thomassen said:
when the car is in the hot sun it takes longer

I wonder if this is a clue. Fuel issue?

J

Mark Piercy · Tuesday at 15:32

An air leak maybe

aj1954 · Tuesday at 15:48

I wouldn't put it in gear at 1800 rpm.

pwood999 · Tuesday at 16:17

Regardless of GEMS or Thor, clean the Idle Valve & Throttle body and as said above check for air leaks. Also chekc if the throttle or cruise cables are sticking.

mjb.thomassen · Tuesday at 16:19

It is a gems year 1994
I ll start to check control valve and throttle pos sensor , it has not been apart for 10 years and check all vac hoses.I don t think it is a petrol issue.when it runs it runs good

P38 4.6 goes to 1800 rpm after starting

mjb.thomassen

Member

kermit_rr

Very

mjb.thomassen

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marjon

Well-Known Member

Mark Piercy

Well fumbled member....

aj1954

Well-Known Member

pwood999

Well-Known Member

mjb.thomassen

Member

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