I have been tuning on this vehicle for a while and it is running very well, but it didn't seem to have the power or gas mileage I thought it should. Although Megatune showed timing was moving appropriately under different conditions, I put a Timing light on the engine anyways and to my surprise the timing stays at ~10 BTDC at all engine speeds, etc.
I have checked and B pin does receive 5v during run and not start.
I have modified the MS-II with the "transistor Modification" and added a second MAP, other than that it "as built" per assembly instructions.
Any suggestions on what to check to troubleshoot this issue would be greatly appreciated.
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Thanks
Don
ignition advance stuck at 10 degrees BTDC - Limp ?
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
ignition advance stuck at 10 degrees BTDC - Limp ?
1986 Toyota 4-Runner with a 1999 Twin Turbo Chevy 4.3 V6 Vortec. 8.5:1 Comp, 2.02 / 1.60 valves, Mixed ratio Roller Rockers 1.6 intake & 1.5 Exhaust, Roller Cam, custom homemade intake w/ short runners (8" from plenum), using MS-II to control fuel and spark. LC-1 WB-02, HEI 8-pin, 32lb/hr Bosch injectors @ 45psi. Blue Main PC board V3.0, Code version 2.92
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Bernard Fife
- Master Squirter
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Re: ignition advance stuck at 10 degrees BTDC - Limp ?
Don,
I think there are three possibilities:
1. there is no signal being generated in MegaSquirt. This might happen if the IGBTIN to IGN jumper is left out or not well soldered,
2. the signal from the MegaSquirt controller is not making it to the module (I would check the resistance from DB37 pin #36 to the 'E' pin connection for the distributor - it should be less than 1 Ohm), or
3. the module itself is fried.
Lance.
I think there are three possibilities:
1. there is no signal being generated in MegaSquirt. This might happen if the IGBTIN to IGN jumper is left out or not well soldered,
2. the signal from the MegaSquirt controller is not making it to the module (I would check the resistance from DB37 pin #36 to the 'E' pin connection for the distributor - it should be less than 1 Ohm), or
3. the module itself is fried.
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw