#1 |
I think the car's almost there. There's *hopefully* just one last thing I think I need to do and it'll be running tip top. I figure it either has to be incorrect springs or something's up the the HLA's.
As I've said before if the car sits for more that 10 minutes or so it takes several seconds to start and runs on 3 cylinders for like 30 seconds before it smoothes out. After it gets running on all 4 it stays running on all 4.
So since she's all broken in now I've been driving it a bit harder. When it gets up to probably 3800 RPM it looses a lot of power no matter how much boost it's got going in. If I back off on the gas and shift at that point I don't notice any difference in the way it runs. If I let the RPM's keep climbing any higher, after I let off the gas it runs like doo doo for anywhere from say about 5 seconds to 25 seconds. How long it runs poorly seems to depend on how high I let the RPM's get. It sorta feels like it's running on 3 cylinders again during that time and it eventually recovers on its own. Doesn't stall either.
I'm nowhere near being a mechanic, but that seems like valve float to me? But I don't think that would explain why it has this hard start issue. I know for sure that while I'm trying to start it it's spitting unburned fuel into the exhaust. I can live with a hard start for a while, but the power issue I need to take care of as soon as possible if they end up being unrelated.
I could really use some opinions on this. I don't want to just replace crap on a hunch. By the way, I don't have any idea about what parts were used in this engine as far as HLA's or springs. Cam is a Lunati 32904 - .460 lift, 278 duration.
Thanks fellas!
As I've said before if the car sits for more that 10 minutes or so it takes several seconds to start and runs on 3 cylinders for like 30 seconds before it smoothes out. After it gets running on all 4 it stays running on all 4.
So since she's all broken in now I've been driving it a bit harder. When it gets up to probably 3800 RPM it looses a lot of power no matter how much boost it's got going in. If I back off on the gas and shift at that point I don't notice any difference in the way it runs. If I let the RPM's keep climbing any higher, after I let off the gas it runs like doo doo for anywhere from say about 5 seconds to 25 seconds. How long it runs poorly seems to depend on how high I let the RPM's get. It sorta feels like it's running on 3 cylinders again during that time and it eventually recovers on its own. Doesn't stall either.
I'm nowhere near being a mechanic, but that seems like valve float to me? But I don't think that would explain why it has this hard start issue. I know for sure that while I'm trying to start it it's spitting unburned fuel into the exhaust. I can live with a hard start for a while, but the power issue I need to take care of as soon as possible if they end up being unrelated.
I could really use some opinions on this. I don't want to just replace crap on a hunch. By the way, I don't have any idea about what parts were used in this engine as far as HLA's or springs. Cam is a Lunati 32904 - .460 lift, 278 duration.
Thanks fellas!
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels