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Thread: A friend in need...
11-05-2008, 11:52 PM #1
A friend in need...
Ok, my brother has a 1997 Chevy K1500 Silverado with a 350 TBI engine and auto trans. When driving along at highway speeds, the engine sputters and basicly runs like crap. If you floor it, it straightens out somewhat, bit it still sputters just a bit. The SES light also comes on and flashes steday for a few seconds, then goes out. it repeats this constantly. He already has installed new plugs and wires, and his air filter and fuel filter are good. What could be causing this? I'm thinking maybe the throttle position sensor or maybe an oxegen sensor. Any input on this would be greatly appreciated.
Jack.2007 Chevrolet Silverado 1500 Classic.
1993 Dodge Stealth 3.0L V6 - SOLD
Live to ride, Ride to live.
It is what it is, -N- STUFF!!!
11-05-2008, 11:57 PM #2
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Could be a plugged catalytic converter.Darcy
2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.
11-06-2008, 12:03 AM #3
Yeah, that could be a possibilty. I had not thought of that one. Thanks.
But would a plugged cat make the SES light come on and flash like that???
11-06-2008, 04:26 AM #4
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It can. did it on my 96 Monte carlo. Take the truck for a good rip up the highway and right after some decent speeds pullover and check the cat. I will be unusually hot and have a bad smell.Sometimes like rotten eggs. These are tell tale signs.BRYAN
"IF YOU DON'T TREAT IT LIKE A TRUCK IT'S JUST A REALLY BIG CAR"
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11-06-2008, 09:31 AM #5
Check the codes in the computer, it's trying to tell you something.Gary
99 K 1500 Suburban
78 Silverado Big 10 w/factory 454
00 S-10 Blazer
1976 Trans Am
1980 Honda CB900 Custom
11-06-2008, 09:54 AM #6
11-06-2008, 11:15 AM #7
[off soapbox] That said, a flashing SES light like that means that the problem the PCM is seeing is one that it believes can lead to significant/expensive engine damage if not taken care of soon. O2 sensor/TPS/Cat codes usually don't fall into this category. Most of the time when people have reported a flashing SES, it seems to be a misfire code. Whatever the problem is, the best first step is to figure some way to get a code reader on it and find out what the computer has to report.'98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
'92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
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