11-15-2000, 02:18 AM
|
#1 |
| Supreme Member
Join Date: Jul 1999 Location: Tucson,AZ,USA
Posts: 1,386
Car: Junk Engine: Junk with nitrous Transmission: Junk with gears | STRANGE tuning problem: Tach is jerky, throttle response is jerky sometimes
Lately the problem has been seeming to get worse. Here's what it does....at low rpms (although sometimes at high rpms) the tach needle jerks a little bit up and down really fast when I'm giving it just a little bit of gas, and the car accelerates, but it really "jerks" along, unless i give it more than 1/4 throttle, then it seems to be normal. The plug wires are brand new, the carb is perfectly adjusted (just tested it on someone else's car the other day) and everything APPEARS to be in exc. working order. WTF is going on??? And get this, the car feels faster than ever when i gun it, its just that it is jerky at low speeds, low rpms and light peddle applications. I should mention that I"m running two tachs...one autometer 5inch shift lite and I just spliced it into the stock tach wire....would that cuz the weird jerkyness??? I don't see how but you tell me.
Chris
EDIT: oh yeah, forgot to mention, this is on my firebird, and its a non computer controlled circa 1970 style 355 SB chevy setup, double pumper holley, vacuum advance HEI,ect...
------------------
Nice car: 1988 Formula 355, mildly ported/polished Vortec heads, RPM intake, Comp Cams Extreme 268 cam, 650 Holley double pumper, 5-speed/3.73 Richmond gears, and N02 on the way
Old 1/4mile: 13.5@105mph
Evil Car: 78 Pontiac Grand Prix, 500inch caddy motor, edlebrock intake,HP Holley 750 DP race prepped carb, B@M TH350 tranny, 16inch Iroc-Z rims, blacked out chrome, soon to run 10's...
There's no replacement for displacement!
[This message has been edited by ChrisFormula355 (edited November 15, 2000).] | | | |
 
|  |
