odd that tractor battery was stronger than the kick battery.?
all accessories oFF, all.
Connect red post to red post.
then
Always connect frame ground to frame ground. (in old days we had chrome bumpers,sigh)
connecting frame last also protects you from battery explosion, (both ways , the spark or the over load kind)
after start, pull any frame ground first.
if you said exactly what you did , i might be able to see what was at risk.
questions:
was the kick battery main cables , clamped down all all times?
we get this all the time in the huge 8 floor parking garage , 10k cars.
blown ECUs , and many others parts, even expensive stereo, and other nav equip.
sad really.
I can tell you what it isnt.
Not list:
ECT , IAT , NO VSV Solenoids (egr or evap) ,
Can be MAF, MAP (as appropriate) ECU blown to kingdom come.
reverse polarity on anything electronic is the kiss of death.
even a load dump can be deadly.
after jump starting any machine , and you pull off that ground cable.
you can get a huge load dump SPIKE.
this spike can kill lots of electronics.
best is to disconnect your battery minus terminal
and connect your battery minus to the frame of the tractor , last.
then start tractor.
then the ECU is protected.
you might just have a bad maf , but they are more expensive used than ECUs
sometimes
also you can test it , with a simple voltmeter.
if found the full spec for it.
good day and tell me what you want to do.
cheers.
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