88 Convertible with a few issues, could use the help.
2 Attachment(s)
So I picked up this slick little 88, manual transmission, 132k on the odo. No body rust, very minimal rush underneath. So here are the issues I've discovered so far.
- Engine runs but wont idle, previous only states it's a blown coolant seal, however, it only blows a minimal amount of blue smoke at start up. When giving it throttle it revs very slow, almost as if it's only running on one rotor. I work with a couple old Mazda techs, but they stated Mazda rarely let them tear one open, mostly long block swaps. Any help here would be appreciated. - Stereo powers but no audio. It's factory CD/Tape/AM/FM with headrest speakers. I've read that if the speakers ground out the factory amp will shut down, I would like to know if there are any other gremlins I should be looking for. -The top... Now the previous owner disconnected the top from the motors behind the rear seats so he could open the top manually. He never said why/how/when he did this. I don't believe he owned it very long. The switch seems to work, gives the audible beep indicating top movement. But the top is still disconnected from these motors. Before I reconnect them is there any timing I need to do to them? I'd like to take this back to as stock as possible. From the stereo to the suspension. Everyone's input is welcomed an appreciated. |
A blown coolant seal could lead to major problems in the future. If it was sitting for a long while could be carbon build up though. Get some MMO and pour a small amount in the trailing spark plug hole using a hose. pull the egi fuse and crank it a couple times to spread the MMO and let it sit. that should break up any carbon build up.
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If coolant was mixing w/the gasoline then it would be hard for the engine to run properly. If the seal is damaged then it needs to be rebuilt.
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The previous owner drove it until it stopped running properly. It's been started to my knowledge every few days. I'll get some MMO, miracle in a bottle, run it in my fuel for my ecoboost, huge help for the HPFP. I work with a guy who brought me a gift yesterday, he has a Mazda Rotary compression tester. Going to get a good baseline this weekend. Going to pressure test the cooling system as well.
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Rotor 1 compression "using mazda rotary tool" 9.1/9.3/9.2 kg/cm2, Rotor 2 0/0/0 so I found my issue. Now it's time to yank it and swap it out.
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My 91 had the same problem. I adjusted the TPS (Throttle Positioning Sensor) and it helped a great bit. I can't find the link, but it's pretty easy to do, you just have to have the engine warmed up to do it and a multimeter/ohmmeter
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Originally Posted by ThatGuyOnTheGas
(Post 11745787)
My 91 had the same problem. I adjusted the TPS (Throttle Positioning Sensor) and it helped a great bit. I can't find the link, but it's pretty easy to do, you just have to have the engine warmed up to do it and a multimeter/ohmmeter
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