Misfire or shudder?
#1
Misfire or shudder?
Hello, 04 Blazer, 80k miles. It's been doing this for a while, but is becoming more frequent. What happens, is that while in 4th/torque converter lockup, it feels like 4th is shuddering, like locking/unlocking. It only does this going up hills, either at 45 or 70. If it is a long uphill, the check engine light will start flashing, signaling a multiple misfire. I'm not sure if this is a torque converter lockup shudder, or a misfire. I have done plugs, wires, cap, rotor, and fuel pump last spring. If it is a misfire, why is it only under load/going up hills? Looking for insight, help is appreciated, thanks!!
#6
Sign of bad spark wires, check to see if they are on fully. Cheap wires will also do this. Is there any skip when idling?. Open hood at night, take out Underwood light. Look for arcing from wire to metal.
Last edited by newguy; 03-22-2017 at 12:36 PM.
#7
Alright, I'll have to check that. Yes, it has a slight misfire while idling now, that just started. Scanned for codes and it has p0301 stored but the CEL isn't on. I'll check out cyl 1 plug and wire and at the cap.
Thread
Thread Starter
Forum
Replies
Last Post