7000 redline

[5th gen hatch]

ok i'm stumped. i have a gsr obd1 swap with a jdm p72 ecu. i have no trouble codes and everything is hooked up and works. but i can only get my engine up to 7000 rpm. in my chilton manual for my civic it says that fuel cut off is at 7000rpm. so why have i read that other people with the same swap can redline to 8100 or 8200 witch ever it is?

 

[MasterShake]

is your vtec engaging?

 

[orfus5]

your tach may be off for whatever reason.
that happened to me when i swapped a gsr motor into my 94 ex coupe.
it was around 1k off
I got another cluster from some 4dr dx auto, and was right on.....

 

[5th gen hatch]

yeah vtec works. but here's the thing my vetc and secondarys arekicking in when there suposed to . . . i think according to my tach

 

[orfus5]

you could always just borrow like an autometer tach from someone or something, just to make sure.

 

[b16bang]

yea get one of those tachs that tap directly into the distrubutor and go fromt here

 

[wmertz]

u got enough oil in your car? that actually happened to my friend with his ls/vtec.. it sounded like he was hitting off a rev at like 7200.. checked his oil.. he had like none in from an oil leak all of a sudden

 

[weksos]

I would second checking your oil level.

 

[sohclubkid]

werd, oil check/ change, clean Vtec solenoid screen, check timing.... use the search button...

 

[5th gen hatch]

check oil every week. oil is fine. could the signal from the dis be messed up on the way to the tach or could it just be the tach

 

[orfus5]

tach, if the distributor was messed up, it probably wouldnt be running

 

[5th gen hatch]

found out ot was the tach . now my ? is if i run a wire from my dis straight to my tach would that fix the prob?

 

[weksos]

found out ot was the tach . now my ? is if i run a wire from my dis straight to my tach would that fix the prob?

if the tach is broken, running anything to it wont work.