93 4.3 Loping Idle, Stalls, am stumped.
#1
93 4.3 Loping Idle, Stalls, am stumped.
Ok, in summary:
1993 Vortec 4.3 W Vin,
Work done: EGR removed and cleaned w/ new gasket, new cap and rotor, new plugs (Delco), new Spider, new nutkit, new coolant temp sensor, new IAC valve, seafoamed tank and intake, new gas, new fuel filter, new fuel pump 10K mi. ago, new connector for knock sensor.
Blazer lopes on idle, stalling, ocassionally with a few bucks/pops. If bypass mode (tan/white wires) is run, blazer stops loping, won't stall, but runs like crap.
Seems worse when cold, some days no issues.
Any thoughts? It's driving me nuts not to have my wheels and the garages around here aren't helping.
~Ted
1993 Vortec 4.3 W Vin,
Work done: EGR removed and cleaned w/ new gasket, new cap and rotor, new plugs (Delco), new Spider, new nutkit, new coolant temp sensor, new IAC valve, seafoamed tank and intake, new gas, new fuel filter, new fuel pump 10K mi. ago, new connector for knock sensor.
Blazer lopes on idle, stalling, ocassionally with a few bucks/pops. If bypass mode (tan/white wires) is run, blazer stops loping, won't stall, but runs like crap.
Seems worse when cold, some days no issues.
Any thoughts? It's driving me nuts not to have my wheels and the garages around here aren't helping.
~Ted
#2
RE: 93 4.3 Loping Idle, Stalls, am stumped.
no ses light other than when you unhook the pass.compartment wire? JP
#3
RE: 93 4.3 Loping Idle, Stalls, am stumped.
Only get SES when timing sensor is unplugged...
#4
RE: 93 4.3 Loping Idle, Stalls, am stumped.
when u replaced the spider kit and nut kit did u notice any clean/dirty areas?
#5
RE: 93 4.3 Loping Idle, Stalls, am stumped.
Pass. side near FPR was "clean", but now that spider and nutkit are replaced, neither should be an issue. Old nut kit was cracked on inside of bend, old spider seemed ok, but FPR could've been bad.
#6
RE: 93 4.3 Loping Idle, Stalls, am stumped.
Problem finally solved...I think. Time will tell. Turns out it was a bad distributor (whole unit), bearing were shot, allowing movement and variable messed up timing to computer. That's why bypass worked, but problem was intermittant. Will re-post if it turns out not to be fixed... On the plus side, I've replaced all the common bad parts, so I should be good for another 150K!
Thread
Thread Starter
Forum
Replies
Last Post
mritech
2nd Generation S-series (1995-2005) Tech
3
11-29-2010 08:05 PM
see119
2nd Generation S-series (1995-2005) Tech
1
08-30-2005 02:00 PM