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93 STS Running very rich
Help, I have a 93 Seville STS with the Northstar 160k. It is running very rich all of a sudden.I thought it was just a plugged Cat since it was glowing, It's running so rich it has the new Cat glowing underneith the car. I found that I had a leaky injector so I replaced that one. the car is still running super rich. I'm down to 10mpg. the codesall show history, the only current code is t037 lr speed sensor. I tried clearing codes by disconnecting the battery & removing the ecm fuses, but the same codes are there when I hook the battery up,(severalhistory codes, and the 1 current code). I noticed that when I lift the fuel rail nothing comes out of the fpr but fuel squirts out ofthe other tube (next to the wire harness) . Idont knowwhat it's called. Question -- could it be the fuel pressure regulator that's causing fuel tosquirt from that other line? Other than running rich, & burning up my Cat it runs great. Help!!! Thank you
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RE: 93 STS Running very rich
not familiar with the N*, but an engine is an engine and
a ECM is a ECM. read on .. lol ORIGINAL: Stealth wet or black with soot means rich fuel mixture, you may also exerience smoke upon start up and very rought idle. not sure this applies anywhere here but i had my 4x4 with a simialr problem and after months of testing i found a bad sensor -- of all things, the coolant sensor was dead and the ECM interpreted that as the engine being cold and enriched the mixture. $20 later with new sensor all back as it should. ORIGINAL: snapmech its gets too much fuel the plugs are wet ? |
RE: 93 STS Running very rich
The temperture sensor seems to be ok. I get a correct reading. I have checked all other fuses to no avail. Is there a way to test the Fuel Pressure Regulator on this car?
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RE: 93 STS Running very rich
i know you can check the pressure of the fuel delivery .. fuel presuure gauges at auto parts stores not so expensive. the regulator? i have no idea how to check those also, a fuel injector may be stuck partially open? |
RE: 93 STS Running very rich
until this day, i was not aware that in '93, the N* had found its way to other models besides the Allanté. ElDorados are confirmed as now you show the STS. thanks |
RE: 93 STS Running very rich
I havea 93 Seville STS --and I am definately sure that ithas to Northstar Engine in it. I have had a few caddy's in the past. Iam 100% sure that this engine with the bigaluminum plenum is theN* -- besides my other 92 Deville has the 4.9. I have just purchased 8 new fuel injectors -- hopefully this will cure the car from running so rich - otherwise it still runs great.
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RE: 93 STS Running very rich
there is confussion on the '93 models for reports of N* engines. based on your original post, i went on a search and found that some '93 ElDorados also had the N*. i'm still trying to figure out when in '93 the N* showed up on other models. sorry about that .. editing my post above to correct .. |
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