Questionn Wide Open Throttle
Hello all, I have my super ram installed, and my third trans. build lol and finally have my car back, it starts fine and runs fine on a normal take off, If I gun the car full throttle I hear a popping sound almost like a misfire at wide open throttle, I guess at High RPM's ,the car has been sitting for the last six months and I just filled up the tank with fresh gas, not sure what the problem is but if im driving it with a normal throttle its fine but if I gas it I get the pop at high rpms right before shifts, not sure what is causing this. 383 Stroker- Forged Scat Crank,Probe Forged Pistons-LT4 HotCam-Accell Super Ram Lower and Upper intake-Holley 52mm Throttle Body-MSD ignition-Headmen Ceramic coated Headers-30lb red tip injectors-PCM Forless Chip-1.6 Roller Rockers,Yukon 373 gears, and Hours of Head Scratching
IIf your sure the timing is correct and your TPS sensor is set correctly, and you have at least 39 psi of fuel pressure and your injectors all test near nearly the same in the range of 12 -16ohms (they should all test within 2 ohms) your going to find if run it hard for a couple minutes than shut it off without letting it idle, pull all the plugs and post very clear pictures of each labeled as to cylinder number , you can tell a great deal from clear plug pictures, if your running the stock injectors chances are excellent your exceeding the expected pulse duration limits and its leaning out at higher rpms under load.
even those 30 lb injectors may not be keeping up with demand, it depends on the pulse duration the CPU allows,
this is one area in trouble shooting where having pulled trouble codes after experiencing the problem, being able to correctly read spark plugs and having a scanner and posiably a fuel air ratio meter, and IR temp gun can all will come in handy
http://www.injector.com/injectorselection.php
http://www.witchhunter.com/injectorcalc1.php4
viewtopic.php?f=55&t=606
Hello all, I have my super ram installed, and my third trans. build lol and finally have my car back, it starts fine and runs fine on a normal take off, If I gun the car full throttle I hear a popping sound almost like a misfire at wide open throttle, I guess at High RPM's ,the car has been sitting for the last six months and I just filled up the tank with fresh gas, not sure what the problem is but if im driving it with a normal throttle its fine but if I gas it I get the pop at high rpms right before shifts, not sure what is causing this. 383 Stroker- Forged Scat Crank,Probe Forged Pistons-LT4 HotCam-Accell Super Ram Lower and Upper intake-Holley 52mm Throttle Body-MSD ignition-Headmen Ceramic coated Headers-30lb red tip injectors-PCM Forless Chip-1.6 Roller Rockers,Yukon 373 gears, and Hours of Head Scratching
IIf your sure the timing is correct and your TPS sensor is set correctly, and you have at least 39 psi of fuel pressure and your injectors all test near nearly the same in the range of 12 -16ohms (they should all test within 2 ohms) your going to find if run it hard for a couple minutes than shut it off without letting it idle, pull all the plugs and post very clear pictures of each labeled as to cylinder number , you can tell a great deal from clear plug pictures, if your running the stock injectors chances are excellent your exceeding the expected pulse duration limits and its leaning out at higher rpms under load.
even those 30 lb injectors may not be keeping up with demand, it depends on the pulse duration the CPU allows,
this is one area in trouble shooting where having pulled trouble codes after experiencing the problem, being able to correctly read spark plugs and having a scanner and posiably a fuel air ratio meter, and IR temp gun can all will come in handy
http://www.injector.com/injectorselection.php
http://www.witchhunter.com/injectorcalc1.php4
viewtopic.php?f=55&t=606