Diagnostic Code 45 on '91 Blazer 4.3
#1
Diagnostic Code 45 on '91 Blazer 4.3
Code 45 is "rich exhaust indication" according to my manual. I replaced the 02 censor a year or two back with a Bosch brand and have driven the vehicle modestly since then. It spitts and sputters every now and then, the service engine light comes on and the spitting/sputtering goes away for a while but returns after 20-50 miles. What's going on? Any input is much appreciated. Another member was having the same problem but he hasn't posted for a while. I'll try and dig that one up for others to view. Thanks.
#2
i had a similar issue though it didnt trip that code and i was due to my own stupidity, when i replaced the motor in my '94 4.3 i forgot to tighten down the distributor cap and the timing was all ****ed up. not sure if thats of any help to you but who knows if your cap might have rattled loose and your timing could be off
#3
No, it's not the distributor, it runs too good most of the time and I double check it today, thanks for your input though. I believe it has something to do with the emissions, or at least something along those lines.
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