Quick help - Idle not steady / car switching off
#1
Pro
Thread Starter
Quick help - Idle not steady / car switching off
Ciao,
quick help (and suggestion on how/what to verify).
One month ago I sold mine 964 C4 in PERFECT conditions.
No issue ever. Starting fine, running smoothly, keeping the idle and really no problem at all.
Now, after one month, the new owner was contacting me to have some help since the car seems not to "keep the idle" (I know that it's a crap translation).
It means that the car, once started, if you do not keep pressed a little bit the gas, turns off.
On Monday I'll go to see the car. Is there any check I could do or any suggestion on how to fix that?
I probably was not clear. Fell free to ask and I'll try to integrate the info as much as I can.
Many thanks in advance.
quick help (and suggestion on how/what to verify).
One month ago I sold mine 964 C4 in PERFECT conditions.
No issue ever. Starting fine, running smoothly, keeping the idle and really no problem at all.
Now, after one month, the new owner was contacting me to have some help since the car seems not to "keep the idle" (I know that it's a crap translation).
It means that the car, once started, if you do not keep pressed a little bit the gas, turns off.
On Monday I'll go to see the car. Is there any check I could do or any suggestion on how to fix that?
I probably was not clear. Fell free to ask and I'll try to integrate the info as much as I can.
Many thanks in advance.
#4
IHI KING!
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Check the basics
- Battery voltage with car off & on
- V-belts - tight enough?
- Check engine light on?
- Do you have a scan tool - any error codes?
- Is the distributor belt broken? Do both distributor rotors turn together?
- When its idling, are all 6 cylinders firing evenly?
- Battery voltage with car off & on
- V-belts - tight enough?
- Check engine light on?
- Do you have a scan tool - any error codes?
- Is the distributor belt broken? Do both distributor rotors turn together?
- When its idling, are all 6 cylinders firing evenly?
#5
Pro
Thread Starter
Ciao, thanks again,
- Battery voltage with car off & on - Need to check
- V-belts - tight enough? - for sure yes
- Check engine light on? - No
- Do you have a scan tool - any error codes? -I do not have it.
- Is the distributor belt broken? Do both distributor rotors turn together? - No issues here, it seems
- When its idling, are all 6 cylinders firing evenly? - Need to check
- Battery voltage with car off & on - Need to check
- V-belts - tight enough? - for sure yes
- Check engine light on? - No
- Do you have a scan tool - any error codes? -I do not have it.
- Is the distributor belt broken? Do both distributor rotors turn together? - No issues here, it seems
- When its idling, are all 6 cylinders firing evenly? - Need to check
#6
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Location: Stockport uk
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Idle
Id check that the idle microswitch makes contact - you can hear it click if you gently press it.
I had a very similar event with mine - but then I had been playing around with the throttle cable under the car and must have pulled it back slightly so it didn't 'seat' properly.
Might be be worth checking...
I had a very similar event with mine - but then I had been playing around with the throttle cable under the car and must have pulled it back slightly so it didn't 'seat' properly.
Might be be worth checking...
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#10
I have been going through a very similar issue myself. One thing to check for sure is the DME relay. Other possible culprits are the ignition switch as well as the coils and distributor caps/rotors. I changed the coils and saw evidence that they were leaking. After changing the coils and distributor components a 200 km return to home was faultless. Though the distributor components were worn I think they were still probably working well enough. I think the coils were definitely part of my issue. Even after changing the coils I still had a no start problem and making a jumper for the DME relay allowed the car to start again and run normally so I highly suspect that the ignition switch is also becoming faulty.
My car has 100,000 km on it. With mileage are you at?
Pete
Pete
#11
Rennlist Member
If the car is "hunting" for its normal idle speed I would also pull out the IVC and clean it. Lots of DIY if you do a search.
#12
Rennlist Member
Spokes - Think you mean the ICV or to give it’s full title the Idle Control Valve?
#13
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#14
Pro
Thread Starter
Soooo, back.
This morning I went for a"courtesy" drive with the new owner of the car (the original guy who bought mine just sold it the same day making some profit out of that )
Unfortunately (or fortunately) there was not too much to be tested/checked.
The car was driving smoothly as always (until when I owned it).
Only thing I noticed is that this new owner had the "bad" habit of pressing the gas pedal while switching it on and bringing the car a little bit up with RPM, around 1.500 before lifting the gas pedal.
Now... I always started the car with no gas at all, just putting the car in neutral and pressing the clutch pedal. I am wondering if his behaviour could "confuse" the car in terms of idle RPM to be kept (forgive my miserable English)
This morning I went for a"courtesy" drive with the new owner of the car (the original guy who bought mine just sold it the same day making some profit out of that )
Unfortunately (or fortunately) there was not too much to be tested/checked.
The car was driving smoothly as always (until when I owned it).
Only thing I noticed is that this new owner had the "bad" habit of pressing the gas pedal while switching it on and bringing the car a little bit up with RPM, around 1.500 before lifting the gas pedal.
Now... I always started the car with no gas at all, just putting the car in neutral and pressing the clutch pedal. I am wondering if his behaviour could "confuse" the car in terms of idle RPM to be kept (forgive my miserable English)