Engine Performance problem
1993 Chevy Silverado V8 Two Wheel Drive Automatic 228000 miles
Ok, here is the deal the other day I went to start my truck up. First try didn't start thought it was odd usually it starts on the first try. Second try started right up, drove it to work and parked it, later when I got off work went to start it and would not start up. At first I figured the fuel pump went out. So I had to tow it home, next day I replaced the fuel pump motor and strainer only, along with the fuel filter. Hoping it would start, It didn't It turns but will not turn over to stay on. I then sprayed the TBI with starting fluid and it started but was Idling real bad, none the less I stepped on the pedal to give it some gas when I would let go of the gas pedal it Idling bad still, I could see the gas shooting from the TBI into the carb but it was shooting in spurts not a constant flow. I thought that was strange. After awhile it would shut off and would not start on its own again. It was getting late so I figured I would work on it the next morning. Next morning I went and tried to start it once again, and to my suprise it started on its own when I turned the key. No problems at all was Idling perfect as if nothing had happend. I left it for awhile while warmed up, I then peeked into the carb again and I could see the TBI was shooting gas into the carb with a constant flow no interruptions at all. I thought maybe it would be back to normal again, then I decided to take it on a test drive down the freeway, drove it at around 65-70mph for a ways no problems up and down. When I came to a stop light after getting off the free way I felt a jerk like it wanted to shut off, but it stayed on good thing I was close to home. When I pulled up to my house it just died on me no shaking no jumping just dead in drive. I then tried to start it up and it started but then it would die when I would put it in gear. Now I'm stumped. After a bit the temp gage went up close to 210 while the truck was off. That too was odd because I had changed the radiator a few years back to a larger one and it never got hot past 120 not even on hot summer days above 100 degrees especially when I would shut it off. So that was weird I thought. Then I tried to start it and it would not I looked into the carb and I'm not seeing any fuel coming from the TBI anymore bone dry. I checked the codes and at first I got code 54 which according to the repair manual it states "Fuel pump Circuit (low Voltage) what ever that means. I don't have a clue on it. Then I read somewhere about maybe the fuel pump relay switch which I replaced and still no luck, I ran the code test again and now I get codes 22 and 54. 22 is for Throttle Position Sensor (TPS) circuit signal low voltage. Again no clue what it means. Can someone please point me in the right direction as to how I can fix my truck. I really need it for work and I'm running out of options or clues. I'd can't really afford to take it in to the shop. That would have to be last resort. This just all happened out of the blue no signs of it going bad nothing. Also I've heard mentioned something about the fuel pressure, How do I check it where do I look for it? Any and all help is greatly appreciated. Thank you!
have the same problem?
Monday, May 12th, 2008 AT 12:14 AM