90' Gtu Fuel Cut??? Help Needed
02-11-02, 08:25 PM
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90' Gtu Fuel Cut??? Help Needed
I'm just finally picking up the RX-7 I bought. And ran into a problem.
It's a 1990 GTU, it sat for 2 months. BEFORE it sat, it ran wonderfully ( I know the guy who owns/ed it ).
Today, when going to pick it up, it cranked fine. To avoid any problems, I let it warm up at a sit-still. Then, when I pull it out of the driveway and give it some gas, it won't go above 3500 RPM. Whenever it hits it, it's like a fuel cut. Every Gear. The fastest I got it is like 35-40. Can ANYONE tell me what causes it could be?
secondarys not opening up? front set of butterflys not opening? EGR? Carbon? I need to know pretty much everything it could be, when I go to pick it up tomorrow. Thanks!
It's a 1990 GTU, it sat for 2 months. BEFORE it sat, it ran wonderfully ( I know the guy who owns/ed it ).
Today, when going to pick it up, it cranked fine. To avoid any problems, I let it warm up at a sit-still. Then, when I pull it out of the driveway and give it some gas, it won't go above 3500 RPM. Whenever it hits it, it's like a fuel cut. Every Gear. The fastest I got it is like 35-40. Can ANYONE tell me what causes it could be?
secondarys not opening up? front set of butterflys not opening? EGR? Carbon? I need to know pretty much everything it could be, when I go to pick it up tomorrow. Thanks!
02-11-02, 09:56 PM
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Check exactly when it happens. The secondaries are supposed to cut in at 3700-3800rpm. If it's then, your secondaries aren't firing and the motor's trying to run on half the fuel it needs (which it won't).
02-11-02, 10:28 PM
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Approx. 3600-3700 RPM. So, yeah I'm thinking secondaries. Could the VDI be stuck and the 6th ports not opening? or would that create this much of a problem? Also, how would I re-ground the injectors? Don't they go back to the ECU?
My thinking is, go back, Check the secondaries ( not 100% sure HOW at this point ), check the VDI ( wire open if need be ), and if it still won't go over 40MPH, tote the bitch home on a trailor and get cracking!
My thinking is, go back, Check the secondaries ( not 100% sure HOW at this point ), check the VDI ( wire open if need be ), and if it still won't go over 40MPH, tote the bitch home on a trailor and get cracking!
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02-12-02, 12:27 AM
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Originally posted by Liquid Anarchy
Could the VDI be stuck and the 6th ports not opening? or would that create this much of a problem?
Could the VDI be stuck and the 6th ports not opening? or would that create this much of a problem?
02-12-02, 01:09 AM
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I swapped cat back on my 87TII and then at the Auto-X the same thing happened. turns out it was the O2 sensor ground, which is a ground on the back of the exhaust. I replaced that and later added some more grounds to the engine, and it totally eliminated that situation.
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