[Main NG900 & OG93 Bulletin Board | BBFAQ | Prev by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Re: Possible reasons for hesitation and check engine li Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Keith [Email] (#1462) [Profile/Gallery] (more from Keith) on Mon, 15 May 2006 18:15:15 In Reply to: Re: Possible reasons for hesitation and check engine li, Dean, Mon, 15 May 2006 12:49:53 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

Checked the codes and pulled the DI. Only code read: cylinder 4 misfire. The ends of the DI connects (where it connects to the plugs) for cylinders 1 and 4 (as determined by the numbers shown on the head next to the plug) looked discolored with a white coating (powderish that I could wip off), although cylinder 1 looked the worst containing additional spots of a brown coating. The plug and plug slots were dry and oil free although plug 1 had a some rust on it (possible explaining the brown powder above). Upon removing the plugs, plug of cylinder 4 was entirely coated in black carbon, an obvious indication of a less then 100% working cylinder. Other Cylinder plugs looked ok. Hooking up a fire plug into each DI socket and grounding the plug: each cylinder fired, although the 4th cylinder had rather reduced spark. Cylinder 3 also seems to be a little weaker (although not nearly as week as cylinder 4). Cylinder 1 seems to have the strongest spark. Plugs are BCPR7ES11 although gap of plug four is larger at then 0.05 (others are only slightly less). The gap may be related to some messing at idle. I guess that points to the DI being the main problem, although, I will try replacing the plugs first. (Web sights point to my car needing BCPR7ES-11, not BCPR6ES-11. Do you still suggest BCPR6ES-11, I don't know the difference.)

I will keep you posted. Thanks
keith

PS car as 90k miles.

posted by 24.186.218...

• Possible reasons for hesitation and check engine light, Keith , Mon, 15 May 2006 08:42:37
  • Re: Possible reasons for hesitation and check engine li, Dean, Mon, 15 May 2006 12:49:53
    • Re: Possible reasons for hesitation and check engine li, Keith , Mon, 15 May 2006 18:15:15 <-- Viewing This Message
      • Re: Possible reasons for hesitation and check engine li, Dean, Tue, 16 May 2006 00:53:27
        • Re: Possible reasons for hesitation and check engine li, Chris, Sat, 8 Jul 2006 18:38:04
  • Re: Possible reasons for hesitation and check engine light, pokeyjoe , Mon, 15 May 2006 08:42:38
    • Re Possible reasons for hesitation and check engine light, Keith , Mon, 15 May 2006 08:42:39
      • Re: Re Possible reasons for hesitation and check engine light, Wayne, Mon, 15 May 2006 17:37:42
      • Re: Re Possible reasons for hesitation and check engine, Dean, Mon, 15 May 2006 13:00:27
        • Re: Re Possible reasons for hesitation and check engine, Keith , Wed, 17 May 2006 16:41:44
      • During warmup..., PMI, Mon, 15 May 2006 09:39:57

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