Hey. can anyone tell me why my 89 2wd saph missfires shitloads on light throttle between 2000 and 3000rpm. but not higher up in the rev range or anytime when i floor it????? it's making it a nightmare to drive, and i have to do 30 miles a day in it! cheers

 

Hi,

1
Do a road test with TPS disconnected. If OK, TPS is faulty and need cleaning inside. (removing necessary)

2
Do an auto-diag just after trouble, without stop your engine.

Regards

Claude