When I finally wised up and hit Recall on the SM the O2 counts were 8.15, but Retard Degrees were 6.3. This was after 15lbs. of boost from a rolling start. No audible knock. All other SM readings are fine. TT chip for stock injectors. Am I boosting on thin ice here? Don’t want anything to go poof. Thanks
Retard Degrees question
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The ESC/knock system is hearing something. Could be real knock, could be false knock, as the knock sensor is just a microphone & the module a filter.
That means that the ECU is pulling timing to prevent knock. A great rule of thumb is you tune for 0 knock, as any knock is no good. You don't need to hear knock for it to be happening, matter of fact if your hearing it, it's too late. If it is real, things can go poof real quick as you're only at 15 pounds. If you only have 91 octane as an option I'd turn the boost down.
You can look to see if anything is hitting anywhere, causing the false knock? Is it during trans shift points? It could be vibrations, a wiring issue, etc. Knock real or false can be a bit of a wormhole to go down & a bear to figure out.
That means that the ECU is pulling timing to prevent knock. A great rule of thumb is you tune for 0 knock, as any knock is no good. You don't need to hear knock for it to be happening, matter of fact if your hearing it, it's too late. If it is real, things can go poof real quick as you're only at 15 pounds. If you only have 91 octane as an option I'd turn the boost down.
You can look to see if anything is hitting anywhere, causing the false knock? Is it during trans shift points? It could be vibrations, a wiring issue, etc. Knock real or false can be a bit of a wormhole to go down & a bear to figure out.
Thanks for the reply. You are correct in that I only have access to 91 octane. Not sure how to turn down the boost. WG actuator is new. It’s NOT the heavy duty version and the rod is backed down with zero pressure on it. How else can I back off the boost?
2 more questions: I read someplace that the SM needs at least 3 seconds of WOT throttle to register retard on recall. True? I’m chicken to hold it there that long if it’s knocking.
I noticed that the WOT reading on the TPS is low at 3.8. What effect might that have?
Please keep the info & ideas coming. I appreciate it.
2 more questions: I read someplace that the SM needs at least 3 seconds of WOT throttle to register retard on recall. True? I’m chicken to hold it there that long if it’s knocking.
I noticed that the WOT reading on the TPS is low at 3.8. What effect might that have?
Please keep the info & ideas coming. I appreciate it.
XracerX
First Methanol Kits
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TPS should be at 4.2v minimum to 4.8v maximum at WOT. 3.8v doesn't put it into power enrichment mode.
You need to adjust the TPS with the key on engine off so you can read it in SM. It will take 2 people to make it easier.
Just make sure that its around .42-.48v when your not pushing the pedal at all.
15 PSI is TOO much for 91 octane.
Read the TPS and wastegate section. Click on basics below.
You need to adjust the TPS with the key on engine off so you can read it in SM. It will take 2 people to make it easier.
Just make sure that its around .42-.48v when your not pushing the pedal at all.
15 PSI is TOO much for 91 octane.
Read the TPS and wastegate section. Click on basics below.
Last edited:
XracerX
First Methanol Kits
- Joined
- Jun 25, 2001
- Messages
- 183
its in the wastegate section on how to lower it to 12 PSI or just add octane boost
XracerX
First Methanol Kits
- Joined
- Jun 25, 2001
- Messages
- 183
I'm gonna guess your TT chip is made for 92-93 octane therefor has more timing that 91 octane can't handle. You just need better gas to start with or get the chip redone for 91 octane.
If you pull the chip out and look underneath it there is a number that you can contact Eric with and verify what combo that chip is burned for. ALSO It should say right on the chip what octane its for. I can't believe that there is no 93 or 92 octane gas stations anywhere near you.
If you pull the chip out and look underneath it there is a number that you can contact Eric with and verify what combo that chip is burned for. ALSO It should say right on the chip what octane its for. I can't believe that there is no 93 or 92 octane gas stations anywhere near you.
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