bam_89

i just recently built my b16a, i have it in a 1990 crx, when i get on it the motor is redlining at 7000, i have already eliminated oil pressure and the vtec solenoid (wiring, filter screen, etc.), the only problem as far as sensors go is my coolant sensor doesnt work since i put the motor back in, if anybody has any answers please let me know, thanks guys

bam_89

Anybody???

98vtec

fix what you know is wrong.

If you are running an aftermarket ecu, there is typically a cold and hot (engine coolant) rev limiter. If you dont have a coolant sensor then the ecu will never see that the engine is warm and will limit how far you can rev.

95 integra

iTrader: (2)

This guy is dead on. Even the factory ECU does funky stuff if the engine isnt up to temp. Given there are a couple different temp sensors (up to 3 I believed....depending on the year)...so it might not be the problem, but I'd fix it first and go from there.

Terrible One

what ecu or tuning device are you running? i think it may be the coolant temp sensor as well.

bam_89

unfortunately its the stock obd0 pr3 ecu for now

Conan the Destroyer

the ecu that you have makes those motors fall on their face at 7800 so if youre revving to that just be happy.

bam_89

lol hell if i could get 7800 i would be more than happy, im tachin any where from 6500 to 7000

bam_89

and btw when i was rollin with the stock b16 swap it would go to 8000 all day

gearhead16

check engine light on?

Conan the Destroyer

hahaha! i know what it is. a 90 crx has a dx cluster and those are known to be about 1200 rpms off. your motor is running to 8k or more.

put it on a dyno and check it.

bam_89

once again not to be a smartass, but i know my car, i have a auto meter tach wired directly into my msd ignition, i watched it peg at 7k, i set my shift light at 7,500 and it never blinked, therefore it most definitely is not hittin 8k

bam_89

nah but my ecu is throwin the coolant sensor code, i replaced both sensors and still nothin, i think im going to try making sure it is all right in the harness