2nd Generation Specific 1986-1992 Discussion

Nightmare

Old 05-26-2004, 03:37 PM
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Have been handed an 87 RX7 turbo that has a very scetchy past. the car has had a motor swap and runs very poorly.I started with the basics. i have spark at each plug, fuel pressure is 32lbs. when running.I checked compresion as well as i could with a conventional gauge. It has100psi with shrader valve instaled in gauge, and roughly 85lbs. at aconsistant pulsation with out valve installed in gauge. Those readings are for both rotors. My experiance with these power plants is none,if there is any help or suggestions out there I would appriciate it. The tylenol isnt working hopefully some feed back will cure my headache..... thanks.
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Old 05-26-2004, 04:54 PM
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I know it will come up and I am not really sure of an order to check but when there has been a motor swap adn a car running poorly, dollars to doughnuts yiou are going to have vacuum leaks and all the vacuum lines should be checked.
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Old 05-27-2004, 01:13 AM
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pull the top spark plugs out, dump about 1/8 cup of automatic transmission fluid into each hole. its easiest with a hose and funnel. you need to check the plugs anyway.



pull the main egi fuse out of the main fuse box in the engine bay. turn the engine over for 15 seconds or so. let it sit for about 2 hours. put the ege fuse back in. start the car. it will sound funny for a second but this might smooth things out for you. the atf will break down any carbon that might have gotten in the seals or anything like that.



if that doest work. let us know. someone will be able to help you.
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Old 05-31-2004, 10:00 PM
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Those compression #s seem a little low but not too bad for a tII. You probably have missing vacuum lines like someone else said. Also if the air pump isnt hooked up right you will have a huge vacuum leak. Did you clean the fuel sock in the tank and replace the filters, sometimes volume of fuel can be affected by clogged filters. Good luck!



Oh .. timing also make sure your timing is on point
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Old 06-01-2004, 12:28 PM
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Originally Posted by venomrx7' date='May 26 2004, 10:13 PM
pull the top spark plugs out, dump about 1/8 cup of automatic transmission fluid into each hole. its easiest with a hose and funnel. you need to check the plugs anyway.



pull the main egi fuse out of the main fuse box in the engine bay. turn the engine over for 15 seconds or so. let it sit for about 2 hours. put the ege fuse back in. start the car. it will sound funny for a second but this might smooth things out for you. the atf will break down any carbon that might have gotten in the seals or anything like that.



if that doest work. let us know. someone will be able to help you.
I'd try everything else before you do the ATF trick.



Basically if i were you i'd do a full tune up. Replace your spark plugs, check for vacuum leaks, and retune your TPS with a voltimeter. There are writeups in the FAQ's section for this.
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Old 06-01-2004, 10:04 PM
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look for vacuum leaks at all the gasket joints too, and the hose between the turbo and the air filter, they like to crack right by the turbo.



set the throttle position sensor to specs, when the car is hot



you might want to check the timing, although its prolly ok



last but not least the routing of the vacuum lines is super important, they all the need to go to the right place. i had 2 on the acv swapped and it would flood everytime starting hot, when i put em right it would start hot better than it would start cold! the place where its easy to cross em is in the back of the intake manifold
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