#21
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Start by replacing the one coil pack that.was on cylinders 1&4- if that doesn't fix it, check the Ignition Control Module' ground. I would suspect the IC module befoer the ECM and I ALWAYS suspect bad ground connections before anythibg else.
Someone here replaced their ECM on the recommendation of their dealer and it wasn't the problem- the dealer wouldn't let them return it. |
#22
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Quote:
__________________
Tim "Heavy" beer is for wine drinkers that are too embarrassed to drink wine in front of their buddies. "Light" beer is a drinkin' man's beer! |
#23
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Quote:
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#24
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Quote:
Likewise, you could find a used one and reflash it with your motors current CAL file which appears to be ltrmc36.cal
__________________
Tim "Heavy" beer is for wine drinkers that are too embarrassed to drink wine in front of their buddies. "Light" beer is a drinkin' man's beer! |
#25
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There's very little on these engines that ISN'T sourced from GM and the coils are the same as what comes on Northstar engines. The ECM can be bought from other sources, too. The dealer should have shipped the ECM to Indmar or MC for testing, rather than just replacing it.
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#26
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I haven't bought the coil or ECM yet so I am definitely interested in GM sourced parts. Any idea on how to identify the GM numbers for the LTR? I want to try your idea and replace that 1/4 coil pack because I think that will solve it. Maybe I can avoid the ECM altogether. |
#27
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Google for info about how to test the IC module, too. |
#28
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I looked, but maybe I'm looking in the wrong place. Couldn't see any numbers or scan bars, etc. The coils are all the original ones so I would think the numbers would be there somewhere.
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#29
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How on earth do you know that? It amazes me how smart the people on these boards are...
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#30
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The guys that work Indmar's tech line are extremely nice and helpful when it comes to questions. We also have TT member that works for them, EngineNut (Larry). EngineNut is very smart when it comes to all things Indmar. I also have cable needed to flash ECMs which I purchased from Rinda Tech.
__________________
Tim "Heavy" beer is for wine drinkers that are too embarrassed to drink wine in front of their buddies. "Light" beer is a drinkin' man's beer! |
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