Gen 3 jerking when accelerating?

bees · Post by **bees** » Sun Apr 16, 2017 5:18 pm

Hi guys, my B20a7 89 gen 3 man prelude is jerking under acceleration. It idles fine, but when driving, in the transition from light to medium throttle pressure, it hesitates than peaks and repeats...

Checked the usual stuff and just did distributor timing, no difference.

Any ideas?

Cheers Bees.

James 5th gen · Post by **James 5th gen** » Sun Apr 16, 2017 8:11 pm

This happened in my girlfriends car and once we changed the fuel filter it was completely gone, it was a turbo diesel car so it may be different. However i know its better to try the cheaper things first.

Post by **Vtecmec** » Sun Apr 16, 2017 8:21 pm

Fuel filter is a good shout, also O2 sensor if it's FI.

bees · Post by **bees** » Mon Apr 17, 2017 7:04 am

Cheers, done the fuel filter twice now, the first one didnt fit perfectly. No difference. Will try tps throttle position sensor and 02 sensor and let you know how i get on.

Post by **NafemanNathan** » Mon Apr 17, 2017 10:30 am

Is this when the engine is hot or cold or both?

Also, can you replicate the issue stood over the engine?

bees · Post by **bees** » Mon Apr 17, 2017 4:04 pm

Hi, it does it hot or cold but it wont do it stationary, only when driven (under load). Really obvious, bounced along, almost undrivable. No codes showing and have reset.

Hope that helps...???

Andyjess666 · Post by **Andyjess666** » Mon Apr 17, 2017 4:23 pm

I had a old saab an it used to do something what you had after a lot of head scratching turned out to be the rotor arm so I changed dizzy cap an rotor arm an fine from there on might be worth a check

Post by **RattyMcClelland** » Mon Apr 17, 2017 4:28 pm

Timing sounds out.

bees · Post by **bees** » Mon Apr 17, 2017 4:42 pm

Had the strobe light on it. It was out by a couple of degrees but but its made no difference. It runs like a dream on the drive ( stationary).

mercutio · Post by **mercutio** » Mon Apr 17, 2017 5:36 pm

plug leads