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Found 14 results

  1. I was wondering if there is someone that can help me with this truck. It has a rebuilt s&j engine (5.7l 4 bolt main) that I have been fighting to get running well. It has had all new sensors put on it except one thing to note is I received a bad engine with a cracked block installed the first go around and it was ran for a day to work and then next day back to the mechanic so it may have affected the new o2 sensor put on the good engine but I'm not sure. Well this 2nd engine runs really rough when its cold out and the colder it is, the rougher it runs. It takes like 5 to 8 revolutions be
  2. I have a 1999 K2500 regular cab with the 5.7 and 4L80E transmission, 285s for tires. I got 14mpg bringing it home, which was about 250 miles. I've been driving it around and I'm getting about 9-10mpg. I have read that an exhaust, cold air intake, and new 02 sensors. I plan on replacing all of the 02 sensors so I was wandering how many upstream and downstream sensors there? And is there any other ways to improve my fuel economy? Thanks
  3. Hello there! My 1993 Silverado K1500 is throwing code 59. From what I can find this indicates that the transmission fluid sensor circuit voltage is high, which would mean that the sensor is telling the computer that the fluid is too hot? If I clear the codes and start the truck cold, it immediately throws this code. So I know **for sure** that the transmission isn’t actually hot. My question is, how should I go about diagnosing this? Is the sensor external and is there a way I can test to be sure the wiring is right? Or is it internal and should just be replaced? Apprec
  4. Hey, all! I have a question for anyone who know's there stuff about adding HP / Trq to 5.7 350 trucks, and thanks in advance for you info! Truck is: 1998 C1500 single cab, SWB, Sport 350 (5.7). Truck is 99% stock, only added dual cherry bomb glasspacks. Has 205k miles and still runs great, doesn't burn oil, doesn't smoke or knock, etc. Transmission is Muncie and is about ~2 years old. If I have about 2 grand to drop on it to add some HP/Trq what's the best bang for buck? I've been searching around and have been thinking: 1. have it rebuilt into
  5. I am looking for some help here with my truck. Current situation, bought the truck with a no start condition, Discovered Water in the fuel. Drained the lines and put fresh fuel in, started 6-7 times with bad idle then stalled. 8th time started right up drove it around for 30 mins with no codes and prefect idle. Left it idling and went for lunch. Stalled when I was away, could not get it to start. Starting fluid would only keep it going to a few seconds. Then I changed the fuel filter, It Started perfectly for 15 seconds then stalled. It only attempts to start when I leave it alone for a whil
  6. alternator reads 13.6 volts charging. Voltage on the dash is 12. As the vehicle runs the voltage drops slowly until 10 volts. Any suggestions to what the issue is? Brand new battery solid ground on it and positive.
  7. Of course my first post would be a trouble shooting question right. So ive got a 97 5.7 vortec, new starter, alternator, fuel pump and filter. a while back i started having issues getting my truck to start if the engine was warm and i had turned it off. usually quick trips to the store were ok but as soon as my engine gets to temperature it wont start. ideas of where to start looking.
  8. Hey guys, I have a 1992 C1500 Pick up 5.7 liter TBI and I was trying to get some information on it that could help with my building it. I always hear people talking about their LT1's and LS1's and so forth... I was just wondering which engine I had. Any responses are appreciated. If its possible I would like to swap out my TBI Intake and PCM with one from a similar year Camaro with the 5.7 Liter engine but I need to do some research to figure out if that's possible and knowing which engine I have will help a ton.
  9. My truck's check engine light came on so i had a local mechanic shot diagnose it. They told be Cylinder #4 was missing a lot and something about that being just at idle rpms. And cylinder #3 was missing a tad to. Anyone have any idea what it could be? valve maybe? idk.. And i already checked basic stuff like plug and wires.. HELP!
  10. Hey everyone, I am having issues with my 92 c1500 5.7l. I made this account because I desperately need help from people who know more about these things than I do. So let's start. The first thing you need to know is that I have a weird truck. Someone who had it before me said they had the CTS (cooling temperature sensor) go bad, and the temperature gauge doesn't work. Their fix for it? They hooked a manual toggle switch up to the ECU so that they can flip the switch on when the engine is cold, dumping more fuel, and flip the switch off when the engine warms up, giving it a leaner air/f
  11. I recently replaced the cap, rotor, spark plugs, and crankshaft position sensor on my 1999 tahoe (police) and it runs great! But... when I'm driving up slight inclines giving it about 1/4 to 1/3 acceleration, it starts to misfire and run really rough. It goes away immediately if i gas it and it downshifts,or if i let off the gas a little.. does anybody have any advice on how to fix it? Its a 5.7 4x4. I didn't reset any codes or anything when i changed the crank position sensor and i don't have any check engine lighht on (even when it misfires).
  12. Hey guys back from appendix surgery and well came across a new project truck, its a 2000 escalade, the previous owner decided to do a rering rebuild from summit. well needless to say he put it back in and NO go. so i picked it up off him for a small fee. so im pulling the 5.7L(vortec) and am gonna have a friend from the machine shop go thru it and inspect the work and make sure it was put together right. but while its apart i was wondering, timing chain wasnt changed but wanting to possibly put a timing gear set or a double or single roller(which one can work and where can i find it?summit sea
  13. I have a 1989 k2500 5.7 tbi with 171,xxx miles on it. I've had no issues with it until a month ago when the engine is under load it cuts out, as soon as I let off it back fires and everything is normal. I've replaced cap and rotor, plugs and wires, coil, egr valve and solenoid, map sensor, tps and fuel filter trying to track down the culprit. Ran the codes, it came back with code 34 map sensor. Unsure why, cleared the codes and it throws it again. The truck idles just fine just won't drive well. I should probably also include that the truck has no cat anymore and is 3" straight pipped back
  14. Hi maybe someone can help me with my engine swap issues ! I have a Silverado Sportside pickup from 1989 with a 4.3 Liter V6 engine. I have now removed the 4.3 L engine and fixed up the engine room with new paint and wiring and so on..... and i am about to put in a 5.7 L V8 from 1989 to get better perfomance. My Question is: On the torque convertor it is a label with: 8653702 on. Must i change convertor for the new engine (5.7 L), and if so are there anything else i must change ? If so what convertor number is for 5.7 L V8 engine (Gasolin) Best Regars from Finlan
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