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Car Forum / Chevrolet / Chevrolet Trucks / December 20041994 S-10 Fuel Problem
I have a 1994 S-10 with a 4.3 Vortec Z code engine. The truck has 175000 miles and the check engine light just came on with a code for the oxygen sensor. The truck has started to run a little rough when cold, could this be due to the sensor? I also have a strong smell of gasoline such as when older carb's would flood that was present before the check engine light but can not find any leaks. The truck gets around 17 - 18 mpg around town. Would worn injectors in the TBI cause this smell, rough idle, gas mileage. The truck runs good under acceleration but seems sluggish in normal cruise conditions.Thanks for any help. FB ffbrantley@triad.rr.com > I have a 1994 S-10 with a 4.3 Vortec Z code engine. The truck has 175000 > miles and the check engine light just came on with a code for the oxygen [quoted text clipped - 8 lines] > FB > ffbrantley@triad.rr.com take a look at http://www.samscars.com/mage7.html Good Luck...... >> I have a 1994 S-10 with a 4.3 Vortec Z code engine. The truck has 175000 >> miles and the check engine light just came on with a code for the oxygen [quoted text clipped - 12 lines] > >Good Luck...... Wrong type of FI. That page lists info on the CPI (W code in 1994) FI, the OP has TBI. To the OP: Check the fuel spray from the injectors, if it dribbles there's a problem, if it's a nice even cone it should be OK. Do you know if the O2 sensor has ever been replaced? It may be a good idea to change it out as a first step anyway. Better check the eighth Vin number again.....Z is the TBI, W is the vortec. If it is the W there has been lots of problems with the fuel injectors. They need replacement to fix it. They cost about $250 around here but not too hard to change. Anyway, there is a big difference between the two types- W Z >>> I have a 1994 S-10 with a 4.3 Vortec Z code engine. The truck has 175000 >>> miles and the check engine light just came on with a code for the oxygen [quoted text clipped - 25 lines] > O2 sensor has ever been replaced? It may be a good idea to change it > out as a first step anyway. Changed the O2 sensor today seems to idle better I"ll know in the morning with a cold start if it corrected the problem. Thanks for the help. > Better check the eighth Vin number again.....Z is the TBI, W is the vortec. > If it is the W there has been lots of problems with the fuel injectors. They [quoted text clipped - 31 lines] > > O2 sensor has ever been replaced? It may be a good idea to change it > > out as a first step anyway. >I have a 1994 S-10 with a 4.3 Vortec Z code engine. The truck has 175000 > miles and the check engine light just came on with a code for the oxygen [quoted text clipped - 10 lines] > FB > ffbrantley@triad.rr.com WHAT code for the oxgen sensor? There are several that can be set, and each one indicates a different problem. Doc |
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