Over the past few months, an annoying flat spot has developed on my GP 1.9 Sporting.

It tends to happen mainly when the engine is cold, whilst accelerating in 2nd or 3rd gear, and feels like a momentary loss of power (like I've suddenly let go of the accelerator and put it back again).

It's at low speeds (up to 30mph) and below 3,000rpm.

Dealer has looked at it twice and updated ECU, but has been unable to re-create.

Any suggestions please?

Same prob as me mate. ECU update does nothing for it either.

Fault with mine is a sudden loss of power and double jerk (pardon the pun) around 2 n half thousand revs in second gear while cold, in every 1 in maybe 10 cold starts

I had the same thing, after i changed the MAF,not as violent though just a slight hesitation at 2600RPM in third.
I had a MAF problem changed the MAF and it went away for a couple of days,i then put and enclosed IDNK in as i had to break up the original air box to change the filtter,so could get an IDNK easeir than the OG air box.

Any way it came back but worse,the new MAF i got was a cheapie of fleebay and was advised get rid and get a bosch so did,and it went away,but still sometimes gives a little hesitation when warm not when cold.???

It is a puzzler.

Scotty

Glad I'm not the only one with this! Yep, the problems you're both describing is exactly the same as me.

Guess my only option is to take it back in to the dealer and try to demonstrate....I'll just have to leave it there all day and demo it after work when the engine is cold. Trouble is, it doesn't do it on every trip, so it'll be s*ds law that it won't do it!

Has anyone who had a flat spot in the GP managed to fix it/find the problem?
Mine's still there, but better if I only fill with Shell - any other diesel and it's much worse.

Cheers

I only use Shell and so far have not seen or felt this in 30k miles.

Weird...obviously something unusual!

I to have a 1.9 mjet sporting and the very same happens with mine, it went in for it's first service last week and even though i mentioned it to them they found nothing wrong, glad (if that;s the right word) to hear i'm not the only one, please advise if anyone gets a fix to this.

Yeah mine has the same problem. Been to the dealer 3 times, updates done, but the problem persists . Mine is a June '06 build 1.9 Sporting. Would be interested to see if this defect is present in later model vehicles or if the fault has been identified and fixed by Fiat. What are the build dates of your vehicles???

Yep, mine is a June '06 build too...coincidence??!

new2fiat said:

Yep, mine is a June '06 build too...coincidence??!

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Mines a 56 plate, not sure of the build date.... where is that guys? Maybe its a pre 56 thing... in which case FIAT should know what the cause is..

mmm mines a an 06 plate as well anyone tried an aftermarket remap see if this cures it?

scotzman said:

mmm mines a an 06 plate as well anyone tried an aftermarket remap see if this cures it?

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Now that is a good suggestion.

Mine has done this once and that was just after my remap and induction kit, I put it down the the dual mass flywheel struggling, and it hasn't done it since I unplugged the MAF...

I'd be closely looking at the operation of the EGR valve.

EGR valve? Pardon my ignorance, but what is it?

exhaust gas recirculation valve, quite common fault on diesels & can give many different symptons.

exhaust gas recirculation valve, quite common fault on diesels & can give many different symptons.

Click to expand...

Thanks for that. Will look into it.

EGR valve may need cleaning not unheard of on diesels! 2 hour job roughly

I'll mention the EGR valve to the dealers on Monday when I take the car in - thanks for that advice.

I'm not keen on re-maps - although I know the benefits are potentially huge, there's the complication of insurance and warranty....