Volvo v70 GLT, fails and staling in hight acceleration

[scot850]

I'm thinking it is possible to have a bad valve on a pre-98 car and not sure it would throw a code. If the plug is good it and it is fueling ok. It might throw a code from the knock sensor I guess? But I would not expect it to give the other symptoms you are having. It seems that unless you are having fueling pressure issues or starvation on both fuels (unlikely) it has to be something that is common to them both.

Not having experience of the dual fuel set-up, does the MAF get used for both fuels? Otherwise I would be looking at the hoses and Turbo system. I can't recall if you had the system smoke tested? It could be a bad hose or even a cracked or blocked intercooler.

How cold is it in your area just now?

Neil.

[djekan]

I'm thinking it is possible to have a bad valve on a pre-98 car and not sure it would throw a code. If the plug is good it and it is fueling ok. It might throw a code from the knock sensor I guess? But I would not expect it to give the other symptoms you are having. It seems that unless you are having fueling pressure issues or starvation on both fuels (unlikely) it has to be something that is common to them both.

Not having experience of the dual fuel set-up, does the MAF get used for both fuels? Otherwise I would be looking at the hoses and Turbo system. I can't recall if you had the system smoke tested? It could be a bad hose or even a cracked or blocked intercooler.

How cold is it in your area just now?

Neil.

HI, yes I've tested new MAF on both fuels, vacuum hoses checheds, I can't find here any smoke test products...

The cold in Portugal now is about 17ºC, on morning about 7ºC, in fact, I've noted with engine more cold not fail so much but fails.


Knok sensor I can't find it, I think is under manifold, I will check it better, but no errors on VOLFCR...


Thanks for your support

[djekan]

Hi, now I'm found something strange.


car stopped, engaged 1st gear and pull down accelerator at almost redline anda the car doesn't fail, put the second gear and here's wen the car fails, in all gears

Any ideas?

Thank you

[scot850]

Open the distributor and check that it is not full of oil. Also check the cap is not cracked and the rotor arm is not badly worn. Check the contacts in the cap for damage.

A good repair shop should have a smoke machine. I may cost an hours labour but it will at least prove if the air system and pipes and intercooler are all good.

There are Youtube videos on how to build your own smoker system with basic stuff. I seem to recall it has been covered in the past on MVS here.

Neil.

[djekan]

Open the distributor and check that it is not full of oil. Also check the cap is not cracked and the rotor arm is not badly worn. Check the contacts in the cap for damage.

A good repair shop should have a smoke machine. I may cost an hours labour but it will at least prove if the air system and pipes and intercooler are all good.

There are Youtube videos on how to build your own smoker system with basic stuff. I seem to recall it has been covered in the past on MVS here.

Neil.

I've check the distributer right now, and it's fine, I've replaced it at few years ago, but to despiste I put the old distributor cap and the problem prexist.

I will try foud the smoke sistem check

[misha]

Is the ecu tuned or stock?

[djekan]

Is the ecu tuned or stock?

HI, stock


Thank you

[yanga001]

Might not be logical but have you checked the ignition coil? It does not sound like its a problem but I previously had an issue where the coil went out while driving and the car stayed on however the engine stopped/stalled. This happened under high acceleration although my car would not crank after it failed until the coil was replaced. My symptoms were the opposite where pulling high acceleration in a low gear cooked the coil. Look for any signs of damage to it and check the date on it.

[djekan]

Might not be logical but have you checked the ignition coil? It does not sound like its a problem but I previously had an issue where the coil went out while driving and the car stayed on however the engine stopped/stalled. This happened under high acceleration although my car would not crank after it failed until the coil was replaced. My symptoms were the opposite where pulling high acceleration in a low gear cooked the coil. Look for any signs of damage to it and check the date on it.

Hi, I don't think so, because when I intaled LPG system I've replaced the coil and spark cables, anyway I put the old coil and the syntoms maintains

[misha]

What brand are the cables and spark plugs?
Nothing really works except Bougicord on these cars.

Spark plugs can be cheap copper BUT MUST be properly gapped for turbo engines.

N/a can get away with larger gap but for turbo engines gap is critical.