Thread: D2 v8 rough running

When did it get spark plugs and leads last?

JC

justinc, I had a similar problem with my D2 V8 and it was the Mass Air Flow Sensor (MAF) but you will only be guessing unless you get the codes read.

Cheers NPEP

Sorry justinc meant the reply for Haddles

Yes a faulty MAF will cause poor running, usually symptoms are worse when engine is cold.

JC

Not sure when it got plugs and leads. Not on my watch anyway. I held the leads while it was running and never got a belt from them. Plugs look ok but I am no expert. Funny thing is I have a pajero that has done 100k and is still on the original plugs and leads and runs perfectly. I did tighten up an air lead into the inlet manifold and it started to run ok but is back to running rough and the air hose is still tight. It annoys me that it does it on and off. A mate just bought a code reader so I might plug it in and see what gives.

I drove someone's Volvo today that had a similar problem. The plugs were new but the mechanic had disturbed the leads and they weren't plugged back onto their connectors properly. So I suggest:

1. Remove the plugs, check them for gap and cleanliness.

2. Run the engine at night, have someone operate the throttle while in gear with the handbrake on, look for little sparkles from a damaged lead.

3. Get a new set of leads fitted if you are still running the originals, they are around 9-12 years old?

Mines done 166K. I've owned it since new so know the complete history. Mine had a new short engine at just 4K - porous block, which is quite common. Fine since.

First the MAF failed at about 150k. It didn't thrown any codes via Scanguage but did result in jerky and/or delayed gear changes, general hesitation and so on. I managed to get just the sensor part from a UK supplier - i.e. used my original housing. Cost was about $120 from memory and the sensor itself is common to quite a few vehicles e.g. VW and BMW. 2 mins to change just the sensor, 10 mins the complete MAF

Later 2 of the plug leeds started to fail - of course it had to be 2 just to make things harder to trace. No obvious outward signs, just a misfire under load.

From your symtoms I would suspect the leads first. They're cheap but a pig to replace. You need small hands and lots of patience but it can be done, just..

Both these problems are common on the V8..

Oh, and while your at it tighten any water hoses you can see - the OEM clips worked loose on the thermostat on mine and one of the hoses came off a couple of years ago. Fortunately I noticed straight away and it never got too hot. If it had though I'd have been up for all kinds of pain.

FF

HTML Code:

  I managed to get just the sensor part from a UK supplier

sorry to change the subject but any numbers and were did you get just the internals.