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adey · 08-03-2015, 10:34 AM

Bump for a user with a similar problem!

Links to the youtube video of the issue:
https://www.youtube.com/watch?v=vlDRKj5kZh4

AFs are all over the place, although it seems to lean to the lean side (har har). yet, sometimes it will go down to super rich! Maybe a pinched injector O-ring?
Checked all the vac hoses that I have (not many) and re-tightened all intake/IC/throttle piping...
checked MAF wiring, seems to be no issue. startup is strong and instant, the damn thing just won't idle!

Holding the throttle still and trying to keep constant RPMs doesn't work -- the rpms will hit whatever I'm aiming for, and then within a second the revs start to fall, even though my foot is stable on the gas.

Since the video I installed a Tomei FPR and set to about 3.3 bar, it made no difference.

Details:
1998 S13 blacktop sr20det
S15 T28 dual bb turbo
Z32 MAF
Stock Compression
Nismo 555cc injectors
Walbro 255lph fuel pump
HKS wastegate actuator
Tomei exhaust manifold
Tomei adjustable fpr (small)

08-03-2015, 10:34 AM	#25
adey Post Whore! Join Date: Mar 2002 Location: Hong Kong Posts: 3,061 Trader Rating: (0)	Bump for a user with a similar problem! Links to the youtube video of the issue: https://www.youtube.com/watch?v=vlDRKj5kZh4 AFs are all over the place, although it seems to lean to the lean side (har har). yet, sometimes it will go down to super rich! Maybe a pinched injector O-ring? Checked all the vac hoses that I have (not many) and re-tightened all intake/IC/throttle piping... checked MAF wiring, seems to be no issue. startup is strong and instant, the damn thing just won't idle! Holding the throttle still and trying to keep constant RPMs doesn't work -- the rpms will hit whatever I'm aiming for, and then within a second the revs start to fall, even though my foot is stable on the gas. Since the video I installed a Tomei FPR and set to about 3.3 bar, it made no difference. Details: 1998 S13 blacktop sr20det S15 T28 dual bb turbo Z32 MAF Stock Compression Nismo 555cc injectors Walbro 255lph fuel pump HKS wastegate actuator Tomei exhaust manifold Tomei adjustable fpr (small)