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(Post Link) post #1 of 6 Old 21-02-09 Thread Starter
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Help running problems 156

Hi. A few days ago my 1.8 156 started playing up. It is only running on 3 cylinders, cuts out when you brake, misses and farts about when you drive but is ok when you drive at higher revs. There is no smoke coming from the exhaust. I have now changed the plugs, injectors and the coil pack which has made no difference. I have checked for water in the plugs and connections but it's all dry, checked oil and topped it right up. Nothing seems to make any difference. If any one could help me on this problem it would be most appreciated as i need the car every day and it's becoming more and more difficult to drive. Thanks
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Re: running problems 156

Surprised no-one has suggested the MAF. Try unplugging it, and seeing if it makes any difference - if it doesn't, the MAF is goosed and should be replaced. Although they don't usually cause running on three cylinders, the other symptoms sound right. If it is only running on 3, that could be a wiring issue.
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156 1.9JTD 2004

Re: running problems 156


Engine backfires for some reason (Leaky inlet valves?)

Petrol/air mixture in inlet manifold ignites and explodes.

Manifold is made of crappy Italian plastic, in top and bottom halves, held together with plastic clips.

Manifold splits. Clips break. Looks OK but there's a 3mm gap.

Air gets in, causing weak mixture. Car seems like it's running on 3 cylinders.

At high revs, leak is less significant so engine runs OK.

At low revs / idle, vacuum in manifold is lost and insufficient to keep servo working.

Every time you hit the brakes, the servo lets in more air and the engine loses even more power and stalls.

A wild conjecture. But exactly what happened to mine a few years ago. A 2nd hand manifold cost me about 100 and fixed the problem.

Let us all know what the outcome is.
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Re: running problems 156

air intake pipe leaks or servo pipe leak
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(Post Link) post #5 of 6 Old 18-03-09 Thread Starter
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Re: running problems 156

Well, after a few days it cured itself. The car hates water, had a problem before when it rained really hard, so i think it was just another dampness issue, but thanks for all your suggestions
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Re: running problems 156

you should still try and find out exactly what it was an once of prevention is worth a pound of cure my friend

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