Really random chance, but we have seen one car where the tooth on the intake cam got knocked out of place. It is not indexed, nor does it have any markings that I can remember. Put the car at TDC #1 and pop that cam sensor back out and look down to see the tooth. I'll take a look at one in the shop to see where it should be.
Bill Cardell Owner, Flyin Miata Sales 1-800-359-6957 Tech 970-464-5600 Before you call, check out http://www.flyinmiata.com/FAQ/ ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Wiseman, Curtis J Sent: Wednesday, March 21, 2012 5:28 PM To: '[email protected]' Subject: RE: 2002 P0340 after Timing Belt (NPC) Frustration setting in.... I got my Rock Auto cam position sensor in the mail today, installed it five minutes later and ... no change. Still misfires and throws P0340. At least I didn't pay Mazda retail for it. So, gents, what would you suggest now? I assume the next step is to order a crank position sensor and install that? I hate to throw parts at something but I'm not sure what else to do. Is there something else I could have disturbed or installed incorrectly when doing the timing belt job? Coils (on top, 2002)? Plug wires? Those could cause a misfire but I don't know if those would cause a P0340. Arrrgh. Curtis From: Wiseman, Curtis J Sent: Saturday, March 17, 2012 12:30 PM To: '[email protected]' Subject: RE: 2002 P0340 after Timing Belt (NPC) OK then....I tried everybody's suggestions and ended up with the same results, if not a little bit worse. I checked the wiring for pinches, unplugged/replugged the connector several times to clean the contacts, checked the clearance on the crank angle sensor, repositioned and cleaned the sensor itself (there is some tolerance in the mounting). On the plus side, this gave me an opportunity to use the feeler gauge I bought in 1977 to gap the plugs on my 1971 Mach 1. I now have tools that are approaching middle age! Thanks everybody for your suggestions. Larry suggested Rock Auto for the part (which is my "go to" for generic parts anyway) and it is indeed cheaper by far than Mazda ($50). My own suggestion is that, when you order from Rock Auto, be sure to google for a coupon code to save 5% while you're at it. I'll install the part in a few days and let you all know if that works. From: Wiseman, Curtis J Sent: Friday, March 16, 2012 2:56 PM To: Bill Cardell; [email protected] Subject: RE: 2002 P0340 after Timing Belt (NPC) Hey Bill, Two things I didn't realize. One, I didn't know I won the contest. Who knew the Bat Signal would prevail? Secondly, I didn't realize the crank sensor would throw a P0340 too. So I just rotate the crank until a tooth on the disk behind the crank pulley is next to its sensor and use a feeler guage? Bend to fit if necessary? Curtis From: Bill Cardell [mailto:[email protected]] Sent: Friday, March 16, 2012 2:26 PM To: Wiseman, Curtis J; [email protected] Subject: EXTERNAL: RE: 2002 P0340 after Timing Belt (NPC) Curtis, The cam sensors do fail, but check the crank sensor air gap before you buy any parts. Just line up a tooth with the pickup, make sure gap is .030-.040". Easy to bump the sensor during a timing belt and it's a stupid design with only one bolt holding it to the oil pump and nothing to index it. PS Congrats on winning the first Ninja tool picture contest. Still time for the rest of you guys, one more prize. Bill Cardell Owner, Flyin Miata Sales 1-800-359-6957 Tech 970-464-5600 Before you call, check out http://www.flyinmiata.com/FAQ/ ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Wiseman, Curtis J Sent: Friday, March 16, 2012 1:08 PM To: [email protected] Subject: 2002 P0340 after Timing Belt (NPC) Hello all, Sorry for the lack of power content. I did a timing belt change on my 2002. No leaks, no slipped teeth (Ninja tool FTW), no problems...I thought. A couple of days later, the engine had a severe stumble under no special conditions. Ran fine for the rest of the trip (~5 miles). Next trip, minor stumble. Clutch in, observed uneven idle on tach while coasting at speed. Next trip, severe stumble again and CEL. Pulled the code and it's P0340, Cam Position Sensor. From research, I know these go bad. Before spending $90 on a replacement, is there something else I should check? It's certainly curious that it "failed" just after I had the cam cover off and the CPS connector unplugged/replugged. Is it possible that the cam cover is reinstalled slightly "off" so that the positioning of the CPS is marginal with respect to the cam? Something else? Thanks for your help, Curtis
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