94 Chevy 1500 leaking and won't stay cranked

Sarge111
Posts: 1
Joined: Sun Nov 03, 2013 7:46 pm

93 Chevy PU keeps getting a check engine light for faulty O2

Unread post by Sarge111 » Sun Nov 03, 2013 8:14 pm

I have a 93 chevy C1500 with TBI. While driving check engine light comes on. Until the code is erased, idle engine speed fluctuates and eventually shuts off. The code says bad O2 sensor. Don't believe this is the problem since I've replaced it twice. Also, the fuel pump has been replaced twice, plugs, wires, distributor cap rotter and coil, EGR valve, MAP sensor, TP Sensor, cleaned off all engine grounds and none of that fixed the problem. Any other suggestions?

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carriedi
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Joined: Wed Apr 10, 2013 12:42 pm

Re: 93 Chevy PU keeps getting a check engine light for fault

Unread post by carriedi » Mon Nov 04, 2013 12:38 am

what is the code number that you believe says bad O2 sensor?

is the code for rich or lean, or is it for not changing between rich and lean enough times. Have you looked at you O2 sensor signal? it should go over 0.8 and under 0.2 back and forth. If it is hot it should be pretty rapidly. If you pump the gas pedal a few times it should go rich for a little while. If you open a vacuum port it should go lean. Your fuel trim should be around 128 for short term and long term. Drive with the scanner hooked up and watch the O2 sensor and the fuel trims to see what is happening.
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eduardo1
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Joined: Sun Nov 10, 2013 11:37 am

94 chevrolet silverado tbi problem with exessive fuel, timin

Unread post by eduardo1 » Sun Nov 10, 2013 11:57 am

Rebuilt throttle body, previous mech, did not solve problem, excesive fuel and failure to advance timing are causing engine to backfire also I need to verify firing order .

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carriedi
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Joined: Wed Apr 10, 2013 12:42 pm

Re: 94 chevrolet silverado tbi problem with exessive fuel, t

Unread post by carriedi » Sun Nov 10, 2013 11:01 pm

1 6 5 4 3 2 for 4.3L
1 8 4 3 6 5 7 2 for v-8

how do you know there is excessive fuel?
how do you know there is a failure to advance?

Knock sensor and EST module control the electronic advance.
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Hbnettl
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Joined: Mon Jan 20, 2014 1:41 am

94 Chevy 1500 leaking and won't stay cranked

Unread post by Hbnettl » Mon Jan 20, 2014 1:46 am

My 94 Chevy is leaking oil in it looks like 4 different places. I have oil under my truck and behind the passenger front tire. Its been idleing bad and when I am stopped and start to push the gas it jerks when it takes off a few times. It has a hard time gassing up hills and acts like it doesn't want to go at first when I press the gas pedal. If i push the break or let off the gas for a little bit, it automatically dies. And takes about two to three times to get it back cranked and I immediately have to press the gas to keep it running. There is also a rattling noise under the hood when I am pressing the gas but immediately stops when I take my foot off the pedal. Can anyone tell me what the problem may be?

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carriedi
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Re: 94 Chevy 1500 leaking and won't stay cranked

Unread post by carriedi » Tue Jan 21, 2014 1:16 am

you should have a shop look at your vehicle. there are many thing that it could be. injectors, spark, fuel pressure,TPS, maf-map, coil, rotor, plugged exhaust, bad O2 sensors, and on and on. you may need to have it scanned or scoped to see what is happening.
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Slurper
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Joined: Sat Feb 01, 2014 2:05 pm

94 chevy silverado 5.7l runs then dies

Unread post by Slurper » Sat Feb 01, 2014 2:25 pm

It will start and idle or run for a few minutes then die and not restart for hours.

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carriedi
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Joined: Wed Apr 10, 2013 12:42 pm

Re: 94 chevy silverado 5.7l runs then dies

Unread post by carriedi » Sat Feb 01, 2014 2:57 pm

you will have to check, while it will not start, what's missing. Spark, fuel pressure, injector pulse
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Jeffrey
Posts: 2
Joined: Tue Oct 14, 2014 8:15 pm

1999 Silverado Starts and dies

Unread post by Jeffrey » Tue Oct 14, 2014 8:19 pm

I recently did a complete frame swap on my 99 silverado 5.3 and now my obd2 reads error linc,and it will start then die.I do not know what to do now.I have taken it to the garage and they didn't give much info because I didn't have the shop do it.please help me.

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