hondatuner77

i have a small problem my car was working fine and all of a sudden car wont past 3500rpm and CEL comes on code 4 ckp i have swapped multiple working dizzy and s300 and still having the same problem i also ran direct wires from dizzy to ecu and still wont past 3500 my s300 and dizzy works perfectly fine in other cars the only thing i can think of is engine harness but wat confuses me is i ran wires directly and no change. does the dash harness have anything to do with this issue. any info is appreciated thanks. the cars is 94eg with gsr s300

greenhonda420

i had the same problem check the ckp wires all the way back to your ecu to make sure no short in them. no the dash harness has nothing to do with this.

hondatuner77

thanks i will try that next

Former User

Definitely check the two CKP sensor wires for a short or open. Likewise check the distributor and ECU connector terminals. Otherwise, you may need to swap in a known good ECU.