I try to keep stupid questions to a minimum. I also try & source info already presented rather than ask a repetitive question, but... I was warming up the Burb to operating temp for the first time ever. (1990 350 TBI) it got up above 100 but had not completely warmed up & I turned on the heater then immediately died. What the deal? Fuel, vaccume?
CK5
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Truck dies when heater is turned on
- Thread starter nedceifus
- Start date
Need more info...
Did you shut the switch back off , and then have it restart?
What does the voltmeter read before and after re-starting it?
If the volts aren't high enough to keep up with the load of the heater , maybe?
Maybe the ignition switch isn't good enough anymore to keep connection on the terminals for the electrical load?
Did you shut the switch back off , and then have it restart?
What does the voltmeter read before and after re-starting it?
If the volts aren't high enough to keep up with the load of the heater , maybe?
Maybe the ignition switch isn't good enough anymore to keep connection on the terminals for the electrical load?
I was not watching the volt meter when it quit & I did not try to restart it. I ended up having to quit for the night. I have a tranny line off now till I can pick up an AN fitting. When it died was instant. Like I shut off the switch. No sputter, did not sound like the AC pump or alternator drug it down. Voltage is at 13ish volts, 2 day old battery. Ground is GTG. I'll pick up that fitting tomorrow & give it another go. It's not starting without giving it gas with the foot feed so may be it is some kind of fuel issue. I bought a fuel pressure gauge but I need to look into how to check the fuel pressure without a Shrader valve.
I'm not saying that the alternator or A/C drug it down. I was saying electrical load on the ignition circuit. I would think that fuel would cut out slower , unless the injectors were shut off electrically.
Stomis
Professional Amateur
If its an electrical gremlin with the ignition switch I would turn the heater on with the truck off but key on and see if you lose juice on the ECM A and B feed side of the fuses. I had a bad ignition switch cause all sorts of very very odd things in the street truck. Me and others ran down the list of hows and wtfs and no one thought it could be the ignition switch, well I threw it in and it was...
Stomis
Professional Amateur
Btw after reading the title to this thread I thought the pre-preemptive on your question was hilarious.
