For about a week now, my 89 Daytona Shelby has been tapping from what sounds like the head. It comes and goes, gets louder and softer for no reason i can figure out, and the tap gets faster when I rev the engine. I figured it was either a rocker or my cam (S60 cam), so I pulled the valve cover and checked things out. Everything looked peachy, no nasty marks or ridges on the cam and only a small amount of play in the rockers when the cam hits the lowest lift area. So, I put it all back together, started it up to make sure it wasn't going to start pissing oil everywhere, and it started out tap tap tap like normal, then COMPLETELY stopped for about a minute. Now I'm lost as to where to go next.
I'm thinking something accessory related, maybe a bad alternator bearing (been running this same alternator for 6 years on two different cars, and who knows how old it was before i got ahold of it), but I'm looking for a little guidance as to what to check next.
My other issue is I finally got around to installing a Dawes device yesterday. This is the first time I've wired anything up and had it look nice, So I was quite proud of myself, until I went WOT and it didnt light up
. I've verified its getting power and the ground is good, which leaves only the signal wire as my culprit. I did a search and found that the signal wire for a four wire o2 sensor is the black one (going off the wire color before the plug). In trying to keep the wiring clean looking, I decided to connect it to the wire on the other end of the plug from the o2, on the same corner of the plug as the black wire that comes out of the sensor.
My question is; Do the wires cross eachother inside the plug (don't see how or why they would, but stranger things have happened), or am I just looking at a dead o2 sensor. I don't have any codes at all to support it being dead, but I am running the S60 computer which doesnt monitor o2 feedback anyhow. I have no idea how old the sensor is, and my car leaves a pretty good black stain on the ground under the tail pipe when its warming up, so I bet its fouled, just wanted to make sure my wiring was correct before I went to work and spent a days pay on a new o2 sensor the car doesnt even use
Ty, sorry for the long post
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