Is it something to do with secondarys and when you drive it bucks really bad if you give it any more the like 1cm throttle?

 

My n/a did this when I first got this ended up being a clogged cat.

 

na i have a 3 inch turbo back, with all the block off plates done blow off valve and thats it. Its weird tho it only does it sometimes like it will run good then all the sudden the next day it will not run like at all and only rev to 4000

 

You either have a bad secondary injector, a bad connection at the secondary injector, no voltage getting to a secondary injector, or (if an 87 model with the injector resistor pack under the air filter) a bad injector resistor to one of the secondaries causing an open circuit. You could also have a break in the wiring harness or a bad injector driver in the ecu. If the ground clip on top of the rear rotorhousing under the throttlebody is loose it could also cause similar problems.

You're going to have to start checking voltages and resistances on the wires to/from the secondaries, and if that doesnt lead anywhere you'll have to splice in a noid lite and go for a drive to see if there is any injector pulse, since the secondaries are only fired under load.

 

IIRC the FSM has various "under load" testing done by venting the boost sensor to the atmosphere to simulate load - will that bring the secondaries online in the driveway?

-=Russ=-

 

I *think* that procedure only works for series 4 cars. Since the OP didnt specify, I felt it'd be best to go at it the other way.

 

I found out the problem the fuel pump that was just put in about 6 months ago is bad. so im just going to put the walbro 255 in tommarrow