Citi storm 1.4i jerking and revcounter jumping up and down

[Mr blue balls]

hi dubbers

i have an issue with my citi storm 1.4i...it jerks when the car gets hot and whilst doing this the rev counter jumps up and down bigtime! since the problem started iv replaced: coil, bougi cords, distributor, water temp sender, relays(under dash), petrol pump, petrol filter...iv even go e as far as taking the car to someone with a diagnosis plug but he couldnt get the car to communicate with the laptop... please help

[THANAS]

Have you replaced the two fuses next to the battery along with the earth cable/strap? Many issues can be solved on the citi by upgrading the earth. Trust me on this.

[RIAZ]

@ CCBB this may sound like a dumb question but do you have a tutorial on how to do that (with pics)

[THANAS]

I have a small write up in my rides thread. The link is in my signature.

[RIAZ]

I have a small write up in my rides thread. The link is in my signature.

sorry what page number is that ive been looking but cant seem to find it

[keeganA6]

also look for any vacuum leaks, these can cause lots of kak

[Dman97]

Sorry for hijacking the thread guys. @Mr blue balls, you get the issue sorted eventually?
I'm sitting with the exact same problem on jetta 3 2.0mp9 setup.
Car jerks when hot and rev counter does funny things. Replaced coil, throttle body, water temp sensor,..... Even plugged into vag but no error codes besides throttle body that was replaced as I said. So no codes.
The car bucks/jerks particularly bad on a hot day when it's at operating temperature, but in the mornings until it's warmed up it runs 110%. I know the issue is electrical due to the rev counter being jumpy but I'm tire did guessing now, anyone delt with such an issue and solved it?

[cerealkiller]

check the Dizzy? tp 100?

[Dman97]

No tp100, mp9 uses 3 pin coil. We checked with a different coil while it was hot and did that, but still it continued with its ****. We don't know what the hell is wrong here, even checked the harness!

[Ameer]

Im in the same boat, just completed AGG on mp9 polocup without a cam.

Done exhaust Saturday, was driving fine for the day. Drove it a Lil hard the evening, then the hunting began.


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[Dman97]

Someone mentioned on another thread that it could be the map sensor. Doesn't make sense to me because the rev counter moves up and down when stopping then when I drive off its normal but will jerk/buck lower down at 2000-3000rpm. Seems to be fine if it's steady in 5th gear speed. Rev counter moving up and down tells me it is electrical, and I had dizzy issue before, usually causes misfire too, this car ain't misfiring at all. So I don't know, not throwing any codes either. Also, when the car is cold, it does everything 110% no jerking/bucking etc, but as soon as my heat gauge gets to the middle its starts its ****. Something is being affected when it heats up.