SR20 Hesitation - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*fliprayzin240sx* · 08-25-2005, 08:07 PM

K im out of idea here. I got a friends car and its been running like shiet under boost. it runs fine till you try to push it and it starts hesitating from 3k on.

Blacktop S13 SR with custom fmic, safcII and z32 maf
Safc set at 2-6 hi/low at 0 since its still at stock boost. Tried to play with it a bit by adding some fuel at hi map and it helped a bit but still doing it

Things ive tried and looked into:
1. double checked mechanical timing=chain marks are off but its lined up right, put it on TDC, checked cam gear markings and counted 20 links.
2. checked timing=right on 15deg
3. Sparkplugs=NGK BCPR7ES-11 started off gapped at .030 now .026 and still didnt change anything
4. swapped ecu water temp coolant=didnt do shiet
5. swapped maf=didnt do shiet
6. swapped fpr= same
7. checked maf/water wiring and its koo

Im bout out of ideas as far as wut could be causing this. Even when we went back to stock maf...it was doing the same thing. Only thing i can think of is o2 sensor but i dont think itll cause it to hesitate this bad.

08-25-2005, 08:07 PM	#1
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	SR20 Hesitation K im out of idea here. I got a friends car and its been running like shiet under boost. it runs fine till you try to push it and it starts hesitating from 3k on. Blacktop S13 SR with custom fmic, safcII and z32 maf Safc set at 2-6 hi/low at 0 since its still at stock boost. Tried to play with it a bit by adding some fuel at hi map and it helped a bit but still doing it Things ive tried and looked into: 1. double checked mechanical timing=chain marks are off but its lined up right, put it on TDC, checked cam gear markings and counted 20 links. 2. checked timing=right on 15deg 3. Sparkplugs=NGK BCPR7ES-11 started off gapped at .030 now .026 and still didnt change anything 4. swapped ecu water temp coolant=didnt do shiet 5. swapped maf=didnt do shiet 6. swapped fpr= same 7. checked maf/water wiring and its koo Im bout out of ideas as far as wut could be causing this. Even when we went back to stock maf...it was doing the same thing. Only thing i can think of is o2 sensor but i dont think itll cause it to hesitate this bad. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!