91 S10 Blazer with 4.3L TBI. Engine idles alright, timing alright, new spark plugs, new cap and rotor, but still hesitates. Could it be a weak coil, or a dirty fuel filter?
2006-12-04 17:52:32 · 4 answers · asked by Craig C 2 in Cars & Transportation ➔ Maintenance & Repairs
I bet you will find its a TPS or an O2 sensor
get a computer emission scan from a reputable garage or dealer
the only weak coils I ever saw had visible arc traces from their center to their frame. looks like little teeny slug trails.
oh, just thought of it, try an air filter first
2006-12-04 18:26:24 · answer #1 · answered by Anonymous · 0⤊ 0⤋
I'd put my money on a bad injector. The Spider Injectors on these were notorious. Back when there were still a lot of these Blazers on the road it was the one type of fuel injector we kept in stock at my shop.
2006-12-05 01:29:42 · answer #2 · answered by Naughtums 7 · 0⤊ 0⤋
Could be both. But as the idling and starting is fine, it could be the fuel filter.
2006-12-04 22:04:48 · answer #3 · answered by SGK 2 · 0⤊ 0⤋
you betcha. a weak coil that still produces spark will still allow for combustion, but when you floor it yor dumping alot more gas into the cylinders and with a weak spark you runt eh risk of it not being able to ignite the charge properly.
2006-12-04 18:01:39 · answer #4 · answered by Keith C 5 · 0⤊ 1⤋