Odd fault with car. starts and runs ok allbeit with a high tickover accelrates fine untill you go above 3000rev then come back to tickover and try to accelerate again engine cuts briefly
the comes back fine jerking the whole car this kangarooing continues untill the ignition is briefly turned off then back on.driving my mad any ideas ?
Any odd noises from the fuel pump?
No and is fine on full throtle
hall sender.
Get a code reader on it. The 2 plugs are under the glove box area. Have you done any work on it all? check all the connections are the right way round, as there a couple that can fit the wrong way, like co pot and knock sensor.
Hall Sender sounds good to me too.
Hi again just started work on the car again after allthe bad weather checked all plugs etx also changed hall sender from a spare dizzy i had but fault still persists any ideas guys.
Wiring to hall sender ;D Multimeter time! :D
how old is the coil?
Original as far as i can tell
i'd get a new one as a matter of course then to rule that out
Loose inlet manifold/ air getting in/ out somewhere?
A dodgy cable that's breaking connection under engine load perhaps?
Exchanged coil no diff. out of desperation disconected vacuum feed to ecu and blocked off feed to maintain vacuum think it solved problem but engine ran so badley difficult to be certain anyone local got a spare ecu to use as diagnostic live in north sheffield
Vacuum feed to ECU sets fuelling when on boost so it will run very lean on full throttle. I wouldn't try driving it like that too much as you may damage the engine. It will also run rich off boost.
How erratic is the cutting in and out? My car was really badly jerky at one point when I had a bad connection to the knock sensor, it was awful to drive.
drives fine if you stay below 3000ish revs and avoid hard acceleration .drives fine on full throtle problem only occures after you accelerate up to speed then settle down to cruise at say 1500revs .every 2-3 secs engine cuts very briefly and then comes back causing all the car to jerk this continues untill you turn ign off and back on
Tried disconecting knock sensor did not seem to make much difference to engine performance neither did it cure problem.
Finally sorted turned out to be a break in the white lead coming off loom end of knock sensor plug so sam was in the right area and it might explain why it made no difference when i pulled knock sensor plug . you live and learn as they say hope i dont have too many more faults like this one again.