I got my MSII running, fuel only, but I can't seem to eliminate what feels like a really bad missing. AFAIK the car was running fine before I installed the MSII, but I've been struggling with this as soon as I started it up after the installation. I've changed the plugs, wires, cap,rotor so now I'm starting to suspect the MSII may be the culprit. The car idles fine, rock solid,but once I get off idle it will miss all day long. If the injector settings are good enough for it to idle well, could it still cause the solenoids to to exhibit erratic behavior at normal driving RPMs? What am I overlooking?
Thanks
Problem with Erratic Firing.
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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).
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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).
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.
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Problem with Erratic Firing.
Please post a data log of the problem happening and a copy of the MSQ file - this will give us more info to go by.
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Bernard Fife
- Master Squirter
- Posts: 475
- Joined: Thu Oct 29, 2009 12:54 pm
Re: Problem with Erratic Firing.
thr3shold,
All sorts of things could cause this. So as Matt says we need a MSQ and a datalog.
For example, if you have low impedance injectors and the PWM% is set too low, the injectors might open fine at idle (where most of the pulse width is in the 100% PWM Time Threshold) but not open at longer pulse widths (where most of the PW is not at 100%).
Tuning issues (fuel or spark), trigger offset incorrectly set, incorrect tach signal masking settings, and many other things can cause this too.
Lance.
All sorts of things could cause this. So as Matt says we need a MSQ and a datalog.
For example, if you have low impedance injectors and the PWM% is set too low, the injectors might open fine at idle (where most of the pulse width is in the 100% PWM Time Threshold) but not open at longer pulse widths (where most of the PW is not at 100%).
Tuning issues (fuel or spark), trigger offset incorrectly set, incorrect tach signal masking settings, and many other things can cause this too.
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
Re: Problem with Erratic Firing.
Soooo....
Some how a bunch of junk data found its way into my tunes. I've been running on 8 port injectors with some weird flow rate and a narrow band on my dual injector TBI wideband setup. Back to square one.
Some how a bunch of junk data found its way into my tunes. I've been running on 8 port injectors with some weird flow rate and a narrow band on my dual injector TBI wideband setup. Back to square one.
Re: Problem with Erratic Firing.
Finally scrubbed all the bad data and it is running like it should and I can now begin to tune it.