djspawn00

I'm trying to help a friend of mine, she has a 1998 Camry and recently had the sparkplugs changed because she was getting a CEL for misfiring. She's still getting a CEL but this time its PO300, PO302, PO304, PO306 and PO171. I suspect a vacuum leak somewhere but I haven't been able to hear any noticable ones. I also don't know if the correct plugs were used but I would think that it would misfire on the other bank as well if the plugs were the problem... any suggestions or feedback would be appreciated. The car has 77k miles. Thanks in advance.

mmatheny

Does it have the coil overs (coil on top of each plug)? One of those going bad is a common problem, especially with a car that old.

mmatheny

I bought a front and rear one off eBay to troubleshoot my 98 Infinity I30.

96Schwarz

P0302, P0304, P0306 are misfires on cyls 2 4 and 6 respectively. The P0171 is fuel system too lean bank 1. It may have a vacuum leak according to the 171 code, but if it was bad enough to misfire it would have set a P0174 fault also. Check for a slipped timing belt on the front bank of cylinders, thats what I would do first.