IPD sale XeMODeX - Experts in Volvo Electronics

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by jakeb123
Mon Apr 20, 2020 1:43 am
Forum: Volvo S40 & V40 Forum 2000-2004
Topic: Can't believe my 02 S40 has such a broken engine.
Replies: 1
Views: 301

Can't believe my 02 S40 has such a broken engine.

My 02 S40, 1.6 petrol non turbo engine has some serious issues. I can't believe my first ever car is so broken. The engine is B4164S2. The engine has very low compression. I get 120 PSI in ALL cylinders when engine is hot and wide open throttle. And 60 psi when it has cooled off. Adding oil in the c...
by jakeb123
Mon Sep 23, 2019 6:28 am
Forum: Volvo S40 & V40 Forum 2000-2004
Topic: Occasional RPM surge on stop lights.
Replies: 8
Views: 219

Re: Occasional RPM surge on stop lights.

Humor me a bit. Is it possible the issue in the video is caused by a faulty Vacuum Purge Valve or a faulty EVAP canister or really a fault in the EVAP system?
by jakeb123
Fri Sep 20, 2019 3:05 am
Forum: Volvo S40 & V40 Forum 2000-2004
Topic: Occasional RPM surge on stop lights.
Replies: 8
Views: 219

Re: Occasional RPM surge on stop lights.

I just want to clarify that I gave you the wrong code. It was P0171. Basically from time to time, I had noticed using my ELM327 dongle that for a short period of time when I start the car, the Short Fuel Trim was +44%. This might seem like a vacuum leak, you'd be partially correct. All the symptoms ...
by jakeb123
Wed Sep 18, 2019 10:07 am
Forum: Volvo S40 & V40 Forum 2000-2004
Topic: Occasional RPM surge on stop lights.
Replies: 8
Views: 219

Re: Occasional RPM surge on stop lights.

Thanks for the reply. The thing is this isn't the only issue. In rare occasions when the car is cold like in the morning, sometimes I get RPM oscillations that jerk the car back and forth when in gear. And in the rest of the times the car jerks when pressing the gas pedal when it was previously not ...
by jakeb123
Wed Sep 18, 2019 5:21 am
Forum: Volvo S40 & V40 Forum 2000-2004
Topic: Occasional RPM surge on stop lights.
Replies: 8
Views: 219

Occasional RPM surge on stop lights.

Among the many issues I have, some are probably related to this. Basically, I have had an RPM surge once in a while, we are talking about 300-400RPM surge only when on idle. I recently managed to replicate the problem 100% of the times, by quickly and I mean very quickly pressing the gas pedal when ...
by jakeb123
Sat Jun 15, 2019 4:00 am
Forum: Volvo S40 & V40 Forum 2000-2004
Topic: High fuel trims. Bad ECU or what?
Replies: 4
Views: 617

Re: High fuel trims. Bad ECU or what?

I'm confused. You state "My PCV is clogged and it's causing really excessive vacuum and whistling, the vacuum is so strong that trying to take off the oil cap is difficult." Usually a failed / clogged PCV system results in excessive crankcase pressure . If your PCV system needs repair, do that firs...
by jakeb123
Thu Jun 13, 2019 5:12 pm
Forum: Volvo S40 & V40 Forum 2000-2004
Topic: High fuel trims. Bad ECU or what?
Replies: 4
Views: 617

Re: High fuel trims. Bad ECU or what?

Self-bump, but after replacing my tires with brand new ones and cleaning the MAF sensor with a special spray, my LTFT dropped to 5%, now this isn't still 0 or even 1-2%. However, I think the rest is caused by the clogged PCV. As excessive vacuum builds up, air is sucked in from the cam seals or anyw...
by jakeb123
Mon Jun 10, 2019 4:54 am
Forum: Volvo S40 & V40 Forum 2000-2004
Topic: High fuel trims. Bad ECU or what?
Replies: 4
Views: 617

High fuel trims. Bad ECU or what?

I want to preface this by saying I've posted this problem many times on many sites, and nobody has managed to help me. I really wish to get the bottom of this. My volvo is S40 2002, it's petrol non-turbo variant. I have high Long Term Fuel Trim %. It's 10% but has jumped to 13%. It doesn't matter if...