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1996 Neon 2.0 sohcStarts fine. Has a random

Sent to Car Experts September 22 08:42 AM

1996 Neon 2.0 sohc
Starts fine. Has a random multicylinder misfire which is aggrevated by accelerating the engine. Has new plugs. Checked the fuel pressure. According to my guage it holds steady at about 50 psi even when it is misfiring. Not sure if it is in the ignition or in the fuel injection. On the road, it sometimes runs smooth at cruise speed. Other times you can feel the miss. When you start out from a stop it usually begins to miss while accelerating (especially if you do not accelerate very slowly). Number 1 oxygen sensor in running around 0.6-0.7 volts. Number 2 is showing 0.08 to 0.1 volts. Any ideas?

 

Optional Information:
1996 Dodge neon 2.0 sohc

Already Tried:
plugs

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Answer
September 22 10:55 AM (2 hours and 12 minutes and 44 seconds later)
         
ACCEPTEDCheck Mark

It is most likely Ignition related. The Ignition Coil Pack is a common failure on these, it can in some cases pass normal resistance testing as well. To correctly test, you would place the engine on an Ignition Osciliscope and monitor the Kv levels while accelerating. Below is a pic of the location of the Coil Pack.

-Rip

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Please click on "ACCEPT" if I was helpful-or if you still need assistance just reply, before leaving any feedback thanks
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RIP -- Lead Technician -- 100% Positive Feedback on 2110 Car Accepts
A.S.E. Master Technician, Advanced Level, Smog - European, Domestic, & Asian -- Car Category Mentor
Reply
September 22 12:09 PM (1 hour and 14 minutes and 41 seconds later)
         
Reply to RIP's Post: While I was waiting for a reply, I borrowed an inductive timing light and connected it to each of the plug wires one at a time. I could see the number one cylinder misfiring. I exchanged the number one and number 4 wires and retested. The misfire moved to the number 4 cylinder so I replaced the wires and the problem went away.
Thank you for your time. I'll still accept your reply.
Customer (name blocked for privacy)
Info Request
September 22 12:18 PM (8 minutes and 32 seconds later)
         

Good job, but didn't the PCM set a P0301, Cylinder #1 missfire?

-Rip

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RIP -- Lead Technician -- 100% Positive Feedback on 2110 Car Accepts
A.S.E. Master Technician, Advanced Level, Smog - European, Domestic, & Asian -- Car Category Mentor
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