I had recently replaced the alternator in my obs 1990 4.3 v6 Carbureted engine. The truck originally ran but the bearings were going out in alternator. After replacing it, I have no start just crank, I tried jumping the battery to see if that would work but mishap with a dumb friend of mine swapped the cables on terminal while I put the others on and sparked the battery. I replaced the battery and still have crank and no start, I checked fuses and all good. Most of ignition is replaced from 2 years back. Getting spark at wires with tester and can hear fuel pump kick on, I tried starting fluid too. I had a similar problem in past and it was my ECM but I replace and still no start. Any help is useful, thanks!
1990 4.3 v6 Carb, Crank no start
- Thread starter Catbot
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
You HAVE adequate spark? Carbureted, so no injectors to deal with. Fuel pump runs.
1. Out of gas. Check carb accelerator pump to see if float bowl has fuel.
2. Fouled spark plugs
1. Out of gas. Check carb accelerator pump to see if float bowl has fuel.
2. Fouled spark plugs
Spark plugs look good tho, so I'm thinking coil or something along the lines
Test spark power using a spark tester calibrated for HEI. DO NOT use a spark tester that has a stupid light-bulb inside. You want one that forces the spark to actually jump a gap.
One of many styles:
www.amazon.com/dp/B003WZXAWK/?coliid=I3S98D7T1J0RLJ&colid=2VLYZKC3HBBDO&psc=1&ref_=list_c_wl_lv_ov_lig_dp_it
One of many styles:
www.amazon.com/dp/B003WZXAWK/?coliid=I3S98D7T1J0RLJ&colid=2VLYZKC3HBBDO&psc=1&ref_=list_c_wl_lv_ov_lig_dp_it
xc_hide_links_from_guests_guests_error_hide_media
