ENGINE DIE'S

Sounds like the fuel filter or fuel pump (low pressure) to me...?

-marc

Doc

If it's arcing, replace the plug wires FIRST, then the coil.

Doc

Does the fuel pres. drop when under load. Bad filter of weak pump? Fuel line kickrd of comeing apart inside?

line kickrd of comeing apart inside?

Doesn't work that way. Fuel flow is the same at idle or WOT. Whatever the motor doesn't use @ idle just gets returned to the tank. Mechanical pumps increase flow with RPM, electrical pumps do not.

Doc

Doc Have you not learned you can have Pres. but very littlr Vol.

Replacing a partially clogged fuel filter on my '95 S10 4.3l "W" engine fixed my problem of power loss under load. When I cut the relatively new filter apart, it was full of black particles.

OK ...........seems to be running a little better but it also got real warm up here lately(not sure if the cold wheather has any thing to do with it)

i've got new wires and plugs and coil.

First new Plugs and wires. Then new coil. all are spaced proper no arching. Like i said Fuel pressure is good(60psi). Previous owner (freind) put new pump,filter,and tank in it. But it won't hurt to change the filter again. ($cheap) Also like i said in another posting, i removed/checked EGR valve. It was a little dirty but not as bad as i hoped.

Ignition timing maybe? Loose hold down bolt? Might be a good idea to check it.

Happy Holidays

Check your "Epileptic" Converter. Classic symptoms of a clogged converter are 1. Starts and idles ok. 2. runs good for a few minutes. 3. Bogs down when accellerating. Feels like it is not getting gas. Mr goodwrench, or a good shop can pull one of the O2 sensors and connect a pressure tester to confirm.

KenG

Mart>>When my engine is under a load (going up hill, passing on highway or just

The only way you would have decent pressure and little volume would be the fuel lines covered in shit on the inside (like cast iron plumbing in old houses, they close up from the inside) This is IMPOSSIBLE in a fuel system. So Mr. Smarty Pants, any other lessons for me?

Doc

I've had several antique cars with restricted fuel lines, just like cast iron water pipes, but it was from varnish buildup instead of lime/scale buildup. I'm sure that's not the case with a '92 Blazer, though. Dave

Yeah I've seen it on a few OLD vehicles that have sat for 20+ years with gas in the tank and lines, but not in a 92' Blazer. Plus, if his lines were restricted, he'd be getting an 02 lean DTC (Code 13 on OBD-I). Weren't 92' Blazers TBI and not CPI? He said his fuel pressure was 60 psi which is great for a CPI system, but ludicrous for a TBI system.

Doc

GREAT NEWS..............I replaced the coil and it seems to be running great. Under a load , up hills and passsing on the highway. Starts right up. So that seems to have been my problem. $16.99

It still runs a little rough when sitting in park.(chugga chuagga rumble rumble). Im going to try and turn up the idle a little(?) but i guess i can't ask for everything at 155,000 miles.

Thanks to all.

any ideas to tweak the roughness away keep sending.