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View Full Version : Horrible hesitation under load SR20. Help


saleaf
10-12-2010, 11:21 PM
I just finished my S13 red top SR swap. Its been a journey for sure. Finally got the car running. Motor starts and idles great. the motor will free rev fine. Turbo builds some boost with free rev. But when i drive, all gears, once the motor is under load the motor starts horrible bogging and hesitation. Im not sure whats causing it. Ive triple checked everything, vacuum, I/C piping, Coil packs, Wiring everything. I cant figure this out. Just looking for help. Any suggestion, anyone thats over come this.

From idle to about 2k it seems fine. but at WOT it just bogs out hard. Once in higher revs it kinda picks back up. If i let off the throttle it will slightly pick up for a sec.

Just not sure what can be causing this. Any helpful hints?

I'm sure its been covered somewhere by someone before. Ive done a shit ton of research and i cant come up with a solution. So looking for a helpful hint. If you want to shit on my thread i don't care. Just looking for ideas.

superflysr20
10-13-2010, 07:18 AM
Check your timing if you played with it at all. I had mine mistimed at first causing it to hesitate. If the timing is accurate check your maf is plugged in and working fine. If that doesnt work just hit shit! (also check for boost leaks especially from the FMIC cuplers

codyace
10-13-2010, 09:33 AM
Timing
Plugs (and proper heat range/gap)

If it's building some boost with a free rev I bet it's off on cas timing.