Jessica Posted June 23, 2017 Report Share Posted June 23, 2017 So i have a 2000 chevy s10 with the 4.3, it has a misfire. All new plugs wires cap and rotor. Not sure what is going on. Any ideas? Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
Jessica Posted June 24, 2017 Author Report Share Posted June 24, 2017 i did notice there is play in the rotor, i can wiggle it back and forth about a 1/8 to 1/4". Hear these have issues with worn distributor gears. maybe? Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
ShadeTreeMechanic Posted June 24, 2017 Report Share Posted June 24, 2017 Sounds like the bushing in the top of the distributor is worn out. I had a points fired v8 one time with worn bushings and it ran like crap until I replaced the distributor. The dwell was all over the place. I am not sure how bad it would effect an electronic distributor but it can't be good. After this I would clean the injectors. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
Jessica Posted June 24, 2017 Author Report Share Posted June 24, 2017 its running rich so i think the injectors are fine Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
Jessica Posted June 24, 2017 Author Report Share Posted June 24, 2017 im thinking maybe burnt valve. Gonna test that tomorrow. If that is the case i will just rebuild the whole engine as it has 200k miles on it anyway. Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
ShadeTreeMechanic Posted June 24, 2017 Report Share Posted June 24, 2017 Are there any codes from obd? 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
Jessica Posted June 24, 2017 Author Report Share Posted June 24, 2017 previous owner said something about misfire on cyl 5. im gonna hook a scanner up and see what it shows. Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
Williaml Posted June 24, 2017 Report Share Posted June 24, 2017 Try removing and cleaning the iac valve Link to comment Share on other sites More sharing options...
Jessica Posted June 24, 2017 Author Report Share Posted June 24, 2017 i found the map sensor is fitting super loose where it goes in. Could that cause problems? Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
Broke_Audio_Addict Posted June 24, 2017 Report Share Posted June 24, 2017 There should be No reason for a full rebuild on that 4.3 at 200k, i have one with 500k on it thats had no manor engine repairs that still runs strong, start with the simple stuff. You already naned one of the common things on those to cause that issue(distributor gear), antoher simple one that will cause misfires is the fuel pressure regulator. What brand of cap, rotor, wires, and plugs did you use? those engines are really picky about that stuff, id only use ac delco cap, rotor, and wires. That being said a lot of people's definition of "music" is a clipped 30 hz sine wave with some 80 IQ knuckle head grunting about committing crimes and his genitals. Link to comment Share on other sites More sharing options...
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