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#1
08-15-2009, 05:59 PM
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98 -3800 - Stumble under load
Hey,
I have a 98 Firebird with a 3800 and it runs fine except going up a good hill and that's where it stumbles. New plugs - gapped a .50 - I know that's wrong my fault but I dont want to take them out unless I have to. ---NO fun. New wires New Coils Fuel pressure is fine No codes. Any ideas? IG control moduel???? Sensor? Thanks 
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#2
10-21-2009, 04:44 PM
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Re: 98 -3800 - Stumble under load
Did you ever find out what this was?
I have the identical problem...no codes...can't figure what it might be. Thanks.
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#3
10-22-2009, 07:39 AM
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Re: 98 -3800 - Stumble under load
Sure did! After replacing the plugs/wires/coils the stumble got better but was still there. I gave up and took it to a shop. They decieded it was the fuel injectors. Of course $850 later it was still there and they just wanted to hurry me out the door. They had no clue. (Some mechanics
 ) Any way I went back to the basics and decieded to OHM out the plug wires. Brand new Autozone Durabunk wires....They all Ohm'd poorly but #6 was really out of range. I ordered a set of Delco wires -they all Ohm'd much better than the Durabunk and all is good. --- Big $$$$ lesson learned ---- OHM check new plug wires before you install them.
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