only able to rev to 4k help help help
 

my car will only rev to 4k when driving. the check engine light is only but i can not find the problem. I put a turbo on my car last week, and had nothing go wrong until now. I thought it might be a fuel cut, so i added a fmu. It did not fix the problem. Please help

Re:only able to rev to 4k help help help
 

ok list all your fuel management and what car u have. that might help. ill guess and say you got a code 3.

Re:only able to rev to 4k help help help
 

98 honda civic, with a cartech fmu.

Re:only able to rev to 4k help help help
 

check what cel your getting. do you have check valves?

Re:only able to rev to 4k help help help
 

if it is a VTEC motor, check oil level, and check oil pressure sensor.

Re:only able to rev to 4k help help help
 

i dont have any check valves. but what i did is took the ic piping from the intake manifold just to see if there was a boost problem. i still hadt the same thing happen with just free flowing air, no boost.

Re:only able to rev to 4k help help help
 

im betting its Map sensor seeing boost problem.

Re:only able to rev to 4k help help help
 

it is a vtec motor, an the oil is a little low. will low oil be a problem.

Re:only able to rev to 4k help help help
 

why would the car run fine for a week then just having the map not read boost.

Re:only able to rev to 4k help help help
 

u said you had a check engine light right? that means your in limp mode which will cause problems like this. put some oil in the car and reset your ecu, see if it happens again.

if your boosting how are u preventing the map from seeing boost if your not using check vavles?