John Speake

No, not the same, that trick is for digidash diagnosis only.

BC

On a whim I checked the MAF ohms on 4 and 6. They were... 40. So I have adjusted the ohms up to 382.

Now, warm, the car will simply not start with the foot off the pedal. If I ****** it up while starting with gas pedal, I can keep it running for a few moments, but not for long.

So, even though the receipts say this is a new maf, if I am doing the adjustment correctly, someone has changed it or... something to make the car run - and it has been running quite well once running.

I'm quite confused now.

BC

The owner has another 87. I will possibly test that LH in the car and see if there is any difference.

Rob M Budd

Will be interested in the solution. I have the identical problem with my 91 S4.

BC

Hi Rob.

What have you replaced or checked?

Lizard928

John,
Can the idle adaption be run with the STII software?

Mongo

Why not try another battery disconnect followed by an Italian Tune-Up? I have noticed that after a reset, my idle is lower when I drive it slow versus driving it hard. If I let it run to red in first and second gear, it seems like the LH adapts a higher idle since the needle is around 700-750 when warm.

Rob M Budd

Not much. Haven't had the time to fully troubleshoot it.
It happens only when restarted while warm or hot and lasts about a minute or so. If it stalls, I restart and feather the throttle keeping it at about 2k and it goes away in less than a minute.

I was told it may be the ISV so I shot some WD40 into the ISV vacuum hose. It seemed to help since the symptom went away for a couple days. Did it again just the other day, but it didn't help at all. The battery was disconnected too.

John Speake

Hi Colin,
No you can't run idle adaptation with a ST. However after tuning there shouldn't be any necessity.

DanielD

Same here with my 1990. After warm-up on very hot days (like now) it does this...

Mongo

I remember you did your O2 sensor recently too.

Is this symptomatic for all 1990's-on?

BC

I don't think these issues are the ISV. The ISV simply allows air into the engine when the throttle is closed. If you open the throttle, an engine with no ISV at all will still run. This is completely different.

BC

Won't start cold now either.

Lizard928

Reference sensor.

Mongo

+928.

Save yourself some money and get the Volvo crank sensor. Do a search on here. I put the part number on my post when I used it.