my 91 teg with a b18b intsalled still running obd0 runs great, until it warms up it seems like once i drive around for about 5 or 6 mins it doesnt accel. right. it kinda of lunges instead of a smooth take off, but if i take off wot or just a little less it doesnt do it. my tps has been replace due to being broke when i bought the motor so i originally thought that was it but that was a year ago and its been more noticable here lately, the list of mods include. cai, dc header and 2.5in exhaust to a can. and turbo next week i would like to resolve this before i put the turbo on it oh and i replaced o2 sensor plugs wires cap button and fuel filter and still nothing, plus im only getting 23mpg at the best and the motor has 81k on it

 

bump

 

im having same issue as well with my 95 gsr. bump!

 

After its warmed up, does it idle OK? It could be a vacuum leak.

 

it idles around 700 to 1000 rpms, ive checked for vacuum leaks in the past, my car does idle rich like if it had a vacuum leak. and sometimes my brake pedal will go all the way to the floor, would that be because of a vac leak in the booster or my master cylinder going bad.

 

This might be a dumb question but how do i check for vaccum leaks??

 

If it idles at a constant speed (either 700 or 1000 RPM), then there is not a vacuum leak. This would cause and erratic idle (surging).

The correct way to check for vacuum leaks is to use a vacuum gauge hooked up to the manifold while the engine idling. Once you know there is a leak, visual inspection of all seal points.

 

emmanuel2112 you can spray carb cleaner on vacuum line connections, tb and manifold and if theres a leak the car idle will stumble

 

wat is a vaccum line. I know its somewhere around the intake manifold but what exactly is it

 

 

somebody

 

A vacuum line is any connection to the intake manifold that will see vacuum pressures when the engine is throttled.

 

haha im sure that cleared it up for him

 

so can you clear it up for me

 

mc integra explained it perfectly, it just seems like it may be over your head.

 

You see your fuel pressure regulator? you see the small hose that goes to it? that is a vacumn line.