weak power in engine

[Wojti]

Hi, I,m a new user here and my language is not good cause I,m from Poland. In last week i bought fto GPvR 2.0 mivec 1998 year, and the problem is when I push the gas pedal gently tha car accelerate not bad, but when I push the whole to the floor engine stop accelerate and begins to brake. Could You someone tell me what is wrong? thx.

[goz_83]

Where are you located?

[Wojti]

Dundalk

[goz_83]

Is it a automatic or manual version? If it's automatic, it could be a gearbox issue and is more likely a sensor thing, but maybe another member might have another idea. I suggest having a mechanic check it out. Sounds dangerous.

[Wojti]

it is a manual, and the seller told me the remaping the chip was done before and i think it is maybe wong remaps and thats why it happend like that,

[Wojti]

and when i drive about 100km/h and downshift the gear to 3 then engine begins to stop in my opinion suppous to have enough power to accelerate

[Kace]

and when i drive about 100km/h and downshift the gear to 3 then engine begins to stop in my opinion suppous to have enough power to accelerate

This might not be the issue but I would clean the stepper motor first of all - 5 minute job. Search for it on here.

[goz_83]

Could possibly be the stepper as Kace said. Here is a link to show you where it is and how to clean. http://web.archive.org/web/200502090857 ... dling.html

Stepper motors are very hard to come across if you need a replacement. If you are sure the stepper motor is the problem, I have one I can sell, taken from my 95GR last year, which I broke for parts.

[Wojti]

tommorrow i gonna put new spark plugs because what i have they are complitely drifferent what suppoust to be and i saw the intake manifold was not good screwed and maybe there was some extra air comes to the engine. I will see tommorrow and i tell you here. thx

[Kace]

You know that spark plug replacement in a GPVR is not straightforward right (for rear bank of plugs) ? Read the instructions carefully !!!

[goz_83]

+1 on the above. ^ plugs need changing. The 3 in the front bank are easily accessed, but the 3 under the plenum, in the rear are not easy to access. I got mine done at a Garage and I supplied the plugs. If there are loose screws, then make them tight. It does not sound like a spark plug issue more than a sensor issue. If it was, the problem would not happen the way you describe it. The problem would be more consistent.

[Mitsinut]

Wonder if it is going into "limp mode"? Run a diagnostic it'll probably flash a code to you and save alot of time.

[CJ]

Wonder if it is going into "limp mode"?

Its a manual. Sounds like plugs or spark to me....

[Mitsinut]

Wonder if it is going into "limp mode"?

Its a manual. Sounds like plugs or spark to me....

Most cars with a Throttle Position Sensor have a "limp mode", regardless of transmission, although I do agree with you, it is most likely the plugs.

[CJ]

Most cars with a Throttle Position Sensor have a "limp mode", regardless of transmission, although I do agree with you, it is most likely the plugs.

I would be surprised if the FTO ECU is sufficiently advanced to pick up on TPS resistances outside of the recommended tolerances, not to say its not a possibility though, would be worthy of further investigation.

I'd start by investing in a set of fit-and-forget Iridium plugs and go from there. If you have access to a multimeter, test the resistance across the ignition leads - the lower, the better. If one is dramatically higher than the rest then it may point at a bad lead.

[Wojti]

That what i know there was chip tuning done and i dont know who did it and how , i need to go to the dyno for the test and remaping chip for the original settings, i can not check car now because still waiting for the papers to transfer insurance from my bmw.