5-5-5 hard shift 2 psi pattern
06-06-06, 08:05 PM
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5-5-5 hard shift 2 psi pattern
Just got a boost gauge rigged into my 93. I knew for a fact i had a boost problem, and i confirmed it tonite. Did the test, boost held at 5psi steady from 35 in 3rd till redline, then hard shift to 4th and boost dropped to 2psi and stayed there. would build 5psi if i let off and got back on it. Same pattern regardless of gear. At idle, pulling 18in hg. Any ideas?`
car is stock besides 3" dp and 3" catback
car is stock besides 3" dp and 3" catback
Last edited by 93FDADR; 06-06-06 at 08:10 PM.
06-06-06, 08:18 PM
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Any ideas? Yeah, you have some boost leaks. Get out there and start going through the system, starting with the path from the turbos to the throttle body. You have to actually remove the couplers and carefully check them for splits.
Your second problem (2 psi, let off, 5 psi) indicates a problem with the vacuum chamber or the lines leading to/from it. There is a check valve in one of those lines that likes to go bad.
Start troubleshooting: http://www.autosportracetech.com/RX-7/rx7stuff.htm
Your second problem (2 psi, let off, 5 psi) indicates a problem with the vacuum chamber or the lines leading to/from it. There is a check valve in one of those lines that likes to go bad.
Start troubleshooting: http://www.autosportracetech.com/RX-7/rx7stuff.htm
06-06-06, 08:20 PM
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ok sounds good. i already recieved all 4 new check valves and all the silicone hoses are on there way. ill check the couplers tomorrow and order those if need be.
06-06-06, 08:51 PM
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Originally Posted by rynberg
Your second problem (2 psi, let off, 5 psi) indicates a problem with the vacuum chamber or the lines leading to/from it. There is a check valve in one of those lines that likes to go bad.
But if you're like me and you want to be thorough, you can test the check valves too while you're in there.
Dave
06-06-06, 09:25 PM
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Originally Posted by dgeesaman
But boost leaks can also cause these kind of symptoms. I suggest you proceed by first chasing out all the boost leaks, then if you still get inconsistent boost look at the check valve.
But if you're like me and you want to be thorough, you can test the check valves too while you're in there.
Dave
But if you're like me and you want to be thorough, you can test the check valves too while you're in there.
Dave
06-07-06, 12:43 AM
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so it definatly seems like a leak and not a bad solenoid? like i said, i have all new check valves and the silicone line will be here monday. maybe when i do the lines, ill just change all the couplers to silicone with t clamps
06-07-06, 12:50 AM
#7
thats not paint....
Originally Posted by 93FDADR
so it definatly seems like a leak and not a bad solenoid? like i said, i have all new check valves and the silicone line will be here monday. maybe when i do the lines, ill just change all the couplers to silicone with t clamps
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