I have a 2001 blazer X with a built 4.3l and a supercharger. I have had several problems w/ this truck even before modifuications started. Stalling mysteriously, dash lights comming and going, lights brightning and dimming, unusual wiper behavior, ecessive voltage drop from a simple turn signal. My currnent problem is now when accelerating. The vehical innitially accelerates hard then suddenly falls on its face. It has been built and tuned by a prfessional and has run strong in the past. I no longer have accesss to the shop where it was built as I now live 5 hours away in Mooresville NC. I've taken the truck to race shops in town but they have not been able to help or explain. The truck has not been tampred with since last tune and I have no engine light or codes.
2007-06-05 15:14:54 · 5 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
i live in s.c,the mechanic u need 2 c is here,,maybe.
the problems with voltage,lites etc.is a bad wire or grounded wire,,when that happens start pullin fuses and when it stops,that may be the problem,,or near the source.
with it just falling flat,,i dont understand,,need more input on that..the shop is across the road,they do machine shop work on cars,race cars,dirt,and go carts,any way,,give me a little more info.and i can send u trouble shooting tips,,it sounds lelectrical,,may be a short,,fix that first,cause it may cause more problems
2007-06-05 15:25:08 · answer #1 · answered by donttrustsnowmen 5 · 0⤊ 0⤋
Well could be a fuel delivery problem. When you add a supercharger, you also have to re-engineer the injector system to accomodate the larger amounts of air being rammed into the engine. You may be leaning out badly, which is dangerous, since a SC also raises combustion temperatures.
As for the lights issues, you might want to do a diagnostic on your alternator output and the condition of the battery in a load test. If the alternator isn't putting out exactly the right voltage, your car's computer will freak out.
2007-06-05 15:20:26 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Seems like simply monitoring the fuel pressure and the pcm under hard acceleration. Your either losing fuel pressure or spark, assuming the egr has been disabled. Worth a try at least. If it were a wiring, ground, or low voltage issue, that would show up on the pcm monitoring. Good luck, sounds like a nice ride.
2007-06-05 16:02:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Sounds like your voltage problems need fixing before you can troubleshoot the engine stalling problem--could be related if a voltage drop or intermittent ground affects the ignition circuits. Bypass wiring if possible to eliminate the problems in diagnosing the running issue.
2007-06-05 15:25:26 · answer #4 · answered by paul h 7 · 0⤊ 0⤋
might wanna check the idle air control (iac)sensor have the 1992 model s 10 blazer that was acting up same thing it would do on me would stall out i replaced it and never had a problem again costed 88 doller at autozone
2007-06-05 16:43:54 · answer #5 · answered by curious 2 · 0⤊ 0⤋