Megasquirt Has Fuel and Spark but wont Start
Thread Starter
Joined: Apr 2007
Posts: 1,502
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From: St. Thomas
Has Fuel and Spark but wont Start
this is on a S5 tII engine, with mild streetport
I just got my MS2 v3.0 with zeal daughterboard built and wired in. I had only flashed it with the 2.0. firmware...
should i have just used 3.0 I didnt want to stray to far away from Aaron's write up.
theres a few settings that arent in his write up i dont know what to change them too. in the triggerwheel options the second trigger should be active on the rising edge and every rotation of the CRANK or CAM? I have mine on crank??
Im using the stock IAT and coolant sensor, I replaced the bias resistor in R4 with a 47k ohms one, recalibrated the sensors but the temperatures are still off its saying -18c for IAT and coolant Which i think is my problem, its reading to way to cold so it throws everything off.
I'll post my msq after, if someone could check it over it'd be greatly appreciated
it has fuel and spark, but it just wont catch. the car ran amazing and would fire up within a second before the install so its nothing mechanical. it chugs like its goin to start for a second then nothing, I tried holding the gas pedal down to clear it and pulled the spark plugs out, but nothing
any suggestions?
I just got my MS2 v3.0 with zeal daughterboard built and wired in. I had only flashed it with the 2.0. firmware...
should i have just used 3.0 I didnt want to stray to far away from Aaron's write up.
theres a few settings that arent in his write up i dont know what to change them too. in the triggerwheel options the second trigger should be active on the rising edge and every rotation of the CRANK or CAM? I have mine on crank??
Im using the stock IAT and coolant sensor, I replaced the bias resistor in R4 with a 47k ohms one, recalibrated the sensors but the temperatures are still off its saying -18c for IAT and coolant Which i think is my problem, its reading to way to cold so it throws everything off.
I'll post my msq after, if someone could check it over it'd be greatly appreciated
it has fuel and spark, but it just wont catch. the car ran amazing and would fire up within a second before the install so its nothing mechanical. it chugs like its goin to start for a second then nothing, I tried holding the gas pedal down to clear it and pulled the spark plugs out, but nothing
any suggestions?
Thread Starter
Joined: Apr 2007
Posts: 1,502
Likes: 0
From: St. Thomas
Im pretty sure I've got it all figured out. its my own stupidity, I replaced R4 bias resistor with a regular resistor.
should be good to go once i get that changed
I have to wait for the parts to come in
should be good to go once i get that changed
I have to wait for the parts to come in
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
A bias or "regular" resistor? There is no difference. "Bias" just refers to the function that the resistor is serving. Resistors used as bias resistors are the same as any other resistor physically (though generally a part with a better tolerance is used). Did you get funny looks when you went in to order a "bias resistor"? 
Thread Starter
Joined: Apr 2007
Posts: 1,502
Likes: 0
From: St. Thomas
HAHAHAHA thats what i thought when put it in "a resistor's a resistor", then it wasnt working properly and i confused myself, no wonder i couldn't find much info when i googled bias resistor lol.
I used a 5% tolerance and they use the 1% tolerance that must be the differance either way I just picked up a new GM open element with the pigtail from napa today
I used a 5% tolerance and they use the 1% tolerance that must be the differance either way I just picked up a new GM open element with the pigtail from napa today
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