On the way home this evening, as I accelerated away from an island, the car behaved perfectly normally in 2nd gear, but when I changed to 3rd it was as if i was holding the throttle just enough to keep the car going at a constant speed irrespective of how far I pushed the throttle, and then suddenly it picked up with loads of power. Now the car feels flat as a fart below 2500rpm, and loads of power above that value. Any ideas? The car is a ZS TD with a remap, decat, mafam, and EGR disabled.
Cheers
Jim

First question what sort of mileage has the car done????

My first MAF totally died at 32,000 miles, the second one lasted approx another 25,000 miles, i now have a Pieburg one of Ron which works very well and cost a fraction of what a Bosch one will set you back.

My advice is for what one off Ron will cost i would replace what you have got and see what the results are. Tempermental things these MAF's are with a vey short life cycle.

Cheers.

 

Only one way to tell, disconnect it and see.

 

Hmmm?

Another ZS bites the dust in a similar manner to mine. I've replaced the MAF with one of Ron's MAFAM's and a Pierburg and to be honest there is improvement. I have still to tweak it right so it's not all roses.

Will await the outcome of this with some interest. See if it is purely a MAF thing.

 

Unplug it and find out would be my first action.

 

Ok thanks for the replies..
The car has covered approx 34K (its had its speedo replaced so I carn't 100% sure on the exact total) and I'm pretty sure that its running the orriginal MAF. When I bought my MAFAM I specifically got the one that would enable me to use the pierburg MAF. When I uplug the MAF will it restore all the low down power, and not allow the engine to rev over 4000rpm? or will there be some reduction in the low down power? Since Matt remapped the ECU the amount of lowdown power was phenomenal...
Cheers
Jim

 

Odd, odd and more odd! I've been out in the car today, and its running perfectly! not the slightest hint of a flat spot. It pulls strongly up a hill from 40 in top gear. I'll report back if it happens again though...
Cheers for your help guys,
Jim

 

Maybe water had got into the connections/MAF area?

Cheers
Skelo

 

Yeah, thats what I'm thinking...I've been doing loads of short journeys lately, and all this snow/rain/wet roads carn't have helped!
Jim

 

Has anyone got a picture of a MAF sensor (ideally on a 45) and where to unplug.... I know someone with currently lots of BLACK smoke, and think that issue may be MAF related? Could it be?

 

There's a photo well down this page: Cleaning the maf section.

http://tuning-diesels.com/Lseries/2545.htm

Ron

 

If it was lots of black smoke I'd be looking at the EGR valve first though. The MAF sensor usually makes it run lean (so making it slower). Thats assuming that they've already checked the intercooler hoses for splits.

 

I don't think they've checked anything (yet).... so I was just getting some information together...

Can the EGR valve just be unplugged to?

 

egr can be unplugged, but loads of black smoke, poor performance = split in intercooler pipe, just check them.

 

Will do... that's what mine had a while back..... so I know if they press the accelerator the splits become visible....

 

Still running sweet as a nut, and I've done some 250 miles since, so I think it must have been damp on the MAF sensor itself. It behaved its self in all the rain we've had today as well.
Jim