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by lcc014
Fri Jun 19, 2020 4:59 am
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: High Idle when car has been running for a while Topic is solved
Replies: 34
Views: 1022

Re: High Idle when car has been running for a while Topic is solved

Volvo 850 modules and Flash codes. Smoke injection is the best leak detector. You can use starting fluid on the intake side of a running engine for leak detection. When a leak sucks in starting fluid you will hear the engine surge. Could you provide more detail on how to use the starting fluid on t...
by lcc014
Fri Jun 19, 2020 4:56 am
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: High Idle when car has been running for a while Topic is solved
Replies: 34
Views: 1022

Re: High Idle when car has been running for a while Topic is solved

Open up ecu box. If it's Jetronic...it will have 2 ecu(s) in ecu box....for a car with manual transmission and 3 ecu(s)...for a car with automatic transmission. That said... -2 ecu for engine and ignition for a car with manual transmission -3 ecu for engine,ignition and TCM(transmission control mod...
by lcc014
Thu Jun 18, 2020 5:45 pm
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: High Idle when car has been running for a while Topic is solved
Replies: 34
Views: 1022

Re: High Idle when car has been running for a while Topic is solved

Just went out to check for A6 DTC. There was no code, meaning, no LED lighted up in A6 socket. I had tried 4 times, no LED light up. I could see the female connector inside A6 hole, but just no LED light up when compared with A1, A2, etc...

Thanks,

Ching-Ho Cheng
by lcc014
Thu Jun 18, 2020 4:56 pm
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: High Idle when car has been running for a while Topic is solved
Replies: 34
Views: 1022

Re: High Idle when car has been running for a while Topic is solved

I have not tried A6. I only know A1 and A2 are for engine and transmission. I will try A6 to see any DTC.

Thanks,

Ching-Ho Cheng
by lcc014
Thu Jun 18, 2020 3:23 pm
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: High Idle when car has been running for a while Topic is solved
Replies: 34
Views: 1022

Re: High Idle when car has been running for a while Topic is solved

I checked DTC code and found one in A2: 233 (Idle Air Trim Exceeds Control Limits); A1 had no code (111). So any more suggestion to troubleshoot the issue ?

Thanks,

Ching-Ho Cheng
by lcc014
Thu Jun 18, 2020 5:00 am
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: High Idle when car has been running for a while Topic is solved
Replies: 34
Views: 1022

Re: High Idle when car has been running for a while Topic is solved

There is no CEL. I will check the DTC anyway. Exhaust manifold was replaced a while ago due to the flex elbow leak. EGR was replaced years ago when I did the PCV replacement. How to check air leaks in intake, exhaust and EGR valve ?

Thanks,

Ching-Ho Cheng
by lcc014
Wed Jun 17, 2020 6:43 pm
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: High Idle when car has been running for a while Topic is solved
Replies: 34
Views: 1022

High Idle when car has been running for a while Topic is solved

This problem happened in around late April when we had the stay home advisory. When car is "cold" idle is fine, in park or waiting for traffic light. Once the car is driven for a while - "hot", idle speed goes up above 1300 rpm in Park position and a bit over 1000 rpm while waiting for traffic light...
by lcc014
Thu Mar 05, 2020 8:18 am
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: Rattling/Metal Noise when stepping on gas pedal
Replies: 11
Views: 371

Re: Rattling/Metal Noise when stepping on gas pedal

Volvo garage replaced the exhaust manifold and now everything sound normal now :)
by lcc014
Fri Feb 28, 2020 5:21 pm
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: Rattling/Metal Noise when stepping on gas pedal
Replies: 11
Views: 371

Re: Rattling/Metal Noise when stepping on gas pedal

Muffler is "new", replaced last May. @bmdubya1198 hit the bull eye. It was the flex elbow of the exhaust manifold. I will have Volvo garage to replace the manifold.

Thanks,

Ching-Ho Cheng
by lcc014
Thu Feb 27, 2020 6:17 am
Forum: 850 and S70, V70, C70, V70-XC 1992-2000
Topic: Rattling/Metal Noise when stepping on gas pedal
Replies: 11
Views: 371

Re: Rattling/Metal Noise when stepping on gas pedal

Mine car is NA. I did look at that flex portion of the exhaust manifold from underneath, seems fine. I did not remove the heat shield from above to check. One thing though the wire mesh wrapped around that flex elbow had been long gone for a long while.