jca

Hi guys chasing a problem I have a ls1 that misfires beween 4-5500rpm on and off but it noticable worse when u get it hot on the dyno dosnt matter what timing or fuel it runs plug gaps etc changed injectors fuel pumps pressure dosnt drop swapped coil packs map sensors crank and cam sensors every thing seems fine by the logs/scans etc but yesterday it finally throw a couple crank angle sensor codes so checked wireing etc for heat damage sensor is brand new it has a aftermarket crank fitted and pretty sure they had to swap reluctor wheels over b4 I brought the parts engine dos not make and abnormal noises has any one had similar problems b4 I pull things apart

Russ K

iTrader: (1)

Check for excessive crankshaft end play.

Russ Kemp

jca

Hi good point will check

jca

Attachment 436680

Hi guys decide red to pull sump off and check reluctor wheel looks completely different to a sad law wheel can't get it to move on crank with screw driver but the vehicle has got a lot worse and throws crank sensor code every time you get on the loud pedal and timing is very erratic I have checked end play while in car and can get a 12thou feelie Guage in between crank thrust and bearing cap with crank levered forward I'm wondering if wheel is moving a little when it's hot?

jca

Front view crank is a manley

jca

Just took picture of a std wheel looks completely different

jca

Hi just wondered if any one can see the pictures not sure if they loaded up correct

jca

Hi guys just thought I'd give a update I striped down the engine and the reluctor wheel looked ok by eye but was bout 5degrees out which isn't a huge problem but I thought Ive got this far I'm replacing it any way it pretty much just fell off with one tap so my guess is as soon as the engine got hot it was moving round on the crank as it's all back in and running with no problems