mk2davis
Well-known member
You guys are always so helpful. I'm hoping to tap your wisdom one more time... and no, I don't have a logger. ALTHOUGH I WOULD LOVE TO BORROW ONE!
I've been getting my dad's VR4 back into DD status, and it seems to be going well with a few nagging issues. When starting from a stop:
Gentle and slow with the throttle, no issues
50-70 percent throttle, pulls fine until 4k where it loses power, keeps boost, will buck if you don't pull out
100% throttle sometimes pulls like a scalded cat, sometimes pulls like a cat in slow motion, doesn't buck but keeps boost and just isn't that fast
The long block was a remanned motor with Felpro head gasket and APR studs, BSE, 16g small turbo, max 12# boost, rewired Walbro 190hp pump, and 2.5" exhaust.
New meaning 3 months old and 700 miles: NGK spark plug wires, NGK spark plugs gapped at .028", fuel filter, fuel pump, ISC, RC Injectors cleaned and blueprinted stock injectors, OEM FPR... I think I may be forgetting some things
Base timing was set correctly at 5* before the ECU was sent for inspection by ECMTuning. FIAV blocked off. Boost leak out of throttle body shaft.
Plan of action:
Replace Throttle body seals (most TB issues I've read about are at idle. This car's idle is rock steady at 850.)
Check TPS
I've read a bad CAS could lead to this? I don't just want to throw parts at this... It's bad for the body work.
I've read about some people replacing a transistor? I don't know where or what it does.
Besides this, I'm stumped. Please help me, OBGalant Kenobe. You're my only hope...
I've been getting my dad's VR4 back into DD status, and it seems to be going well with a few nagging issues. When starting from a stop:
Gentle and slow with the throttle, no issues
50-70 percent throttle, pulls fine until 4k where it loses power, keeps boost, will buck if you don't pull out
100% throttle sometimes pulls like a scalded cat, sometimes pulls like a cat in slow motion, doesn't buck but keeps boost and just isn't that fast
The long block was a remanned motor with Felpro head gasket and APR studs, BSE, 16g small turbo, max 12# boost, rewired Walbro 190hp pump, and 2.5" exhaust.
New meaning 3 months old and 700 miles: NGK spark plug wires, NGK spark plugs gapped at .028", fuel filter, fuel pump, ISC, RC Injectors cleaned and blueprinted stock injectors, OEM FPR... I think I may be forgetting some things
Base timing was set correctly at 5* before the ECU was sent for inspection by ECMTuning. FIAV blocked off. Boost leak out of throttle body shaft.
Plan of action:
Replace Throttle body seals (most TB issues I've read about are at idle. This car's idle is rock steady at 850.)
Check TPS
I've read a bad CAS could lead to this? I don't just want to throw parts at this... It's bad for the body work.
I've read about some people replacing a transistor? I don't know where or what it does.
Besides this, I'm stumped. Please help me, OBGalant Kenobe. You're my only hope...