problems with sr

[hulkster_s13]

so heres the problem, when we start the car it idles fine. once we hit 2200rpms the car bogs to 2000 rpm then it will rev up fine. it sort of *burps*. we changed all of these parts to see if maybe it was the problem. first we changed the bov thinking iwas leaking. it still had the same symptom. double checked all couplers and hose clamps.still no deals. changed the spark plugs.nothing new changed. played with the CAS. nada. changed ECUs. and after all that no change. i dont think its the MAF because ive had a MAF problem before. it doesnt seem like the problem. the engine harness was from a auto sr and we wire in our own plug.maybe the problem?

[boosteds13]

bad ignition coil? bad ignitor?

[hulkster_s13]

tried ignitor no change.its too dark for me to try coil packs right now. but would a faulty coil pack be that consistant all the time. after 2200 rpm its fine. wouldnt a coil pack be bad all the time? i wouldnt know. but thanks for the suggestions. just so it doesnt come up its not the fuel filter. the one thats in there is a new 300zx one.

[Sil Beer S13]

what injectors are you running?

[hulkster_s13]

stock injectors. okay so here is more descriptions of the problems. if the throttle is hit hard it will just go past the problem. if throttle is gradual then it bogs, almost to the point of stalling the motor. it wasnt a fall back to 2grand like i said before. sorry for the mis info.(this isnt my motor thats why)

[hulkster_s13]

so we changed coil packs and injectors, that wasnt the problem. we have a fmic setup so i sugessted that we change to the side mount because maybe the the piping had a pinhole in it.BINGO! no more stumble. but now the turbo manifold is glowing bright red! and we cant get over 4000 rpm.checked timing and it was dead on 15deg. is the higher compression (9.0:1 ) to much for stock injectors and stock ecu. should i retard timing?

[420sx]

i know u dont want to hear it but sounds like the MAF. check your maf and check the voltage. make sure its wired in properly and the wires are isolated and wrapped for no interferance

good luck

[hulkster_s13]

we changed the MAF i forgot to mention that.did that with the intercooler swap

[hulkster_s13]

anyone?
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