Sr will rev up only with no load

[jskateborders]

It will rev up to redline with no load but in gear while driving, it stumbles around 4k and wont go higher. Thats the only issue im having right now as of yet, really need help on this one, and yes i did search.

[slider2828]

Check your injectors, Check your Plugs, but most likely your coilpacks. Had this issue before...

[harleys]

MAFS is my guess.

[jskateborders]

Check your injectors, Check your Plugs, but most likely your coilpacks. Had this issue before...
i would think thatcoilpacks would not only bog with load

[jskateborders]

MAFS is my guess.
but that would affect rev with or withought load right?. it revs fine withought load.

[harleys]

try unplugging your maf and see if it does the same thing.

[Edcel]

most likely you have a boost leak...check all your intercooler piping and make sure all clamps are tight..common issue for swaps...

search is your friend ;)

[GSXRJJordan]

MAFS does not act the same under load as it does with no load - it has to do with the fact that you can't generate (much) boost without load. Might be dirty/malfunctioning. Probably not coilpacks (because the spark is always the same). Could be a boost leak.

[DJ_Sunrise]

Search is your friend if you know what to look for, and he doesn't so I'll try to be of some help. If your coilpacks are complete shit, the motor will stumble under load of any sort, rpm independant. If you have a temp gun, take the car for a spin, and check the temps on the white part of the coil packs. Bad packs are off by 3 degrees celcius compared to the others. Boost leak is something to check FFS, but that shouldn't be the problem. Clean as many grounds as you possible see.. coil pack grounds on the intake manifold, battery ground, etc. Check that the main ground is good. Go to you tube and search "sr20 mafs repair",or "240sx mafs repair", something of that sort. The guy shows you how to check the pin connections. At any rate, you may want to check another MAFS. Post back with any progress.

-Bart

[jskateborders]

it was boost issues. figured it out. thanks for all your help guys