lack of power at low rpm

No, they're not. Change the wires.

Yep , althought the wires lookes oke, be wise and changed them. First thing to do in your case. You'll be surprised

"mac" schreef in bericht news: snipped-for-privacy@4ax.com...

mac wrote in news: snipped-for-privacy@4ax.com:

You could check the wires, just start the engine and raise the hood at night. See all the pretty blue halos around the wires? If so, they're not OK.

Lots of folks say Chevron gas with Techron is a good cleaner for your injectors.

Here in the winter time we have to have oxygenated fuel and any fuel containing MTBE will do a good job of cleaning injectors. You can look in your auto parts store for a cleaner, it will probably contain MTBE.

Thanks for all the help. Have ordered a set of wires.

Thanks. Can't find the reference to the dip stick trick?? More help here please.

Look at the crank pulley when the engine is idling. Does it wobble? If so, the crank nose is probably failing. The loss of power is due to cam timing drift.

So if it is the crank key problem and it is damaged, where is a good place to get a new or rebuilt engine??

A junkyard. An average used 1992 or 1993 engine with less than 100k miles on it should extend your '90's life for years. The crank was redesigned partway through the 1991 model year.

However, many owners have had good results repairing a damaged keyway with Loctite. If it works, you will have saved a bundle; if not, you've only lost a few bucks and a couple of hours. See miata.net for all the gory details.

Don't get overwrought about crankshafts until you've diagnosed your problem, though. It might be something less dire.

I have a 90 with similar symptoms. Couldn't see the wobble of the crank pulley so took it to a dealer who said it's going (checked the timing I guess). You mention the Loctite fix...has it been successful?

Jeff '90 Red

Going to try it this weekend if the weather permits. Will post here one way or the other.

Got it installed today. No major problems, do need the holder to keep the shaft from moving. Will be putting it all back together next weekend and will post more on if it works.

Need help on how to align all the shafts. Was some moving with all this and the timing is way off now. Where are the points to line up for the belt??

well got it back together today. So far so good. Runs fine, but only time will tell. Not that difficult of a task to do, but was not fun by any means.

Was wondering if I might "pick your brain" as to how difficult the Loctite fix was. I'm just a weekend garage mechanic and I'd appreciate your thoughts on any potential problems you encountered.

Jeff '90 Red