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#1
07-15-2004, 06:41 PM
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My engine suddenly lost half of it's power!
I have a 1988 Mazda R-X7 GXL (non-turbo). 13B for a motor. I was driving down the road one day, and the motor suddenly lost probably half of it's power. There was not any noises when it happened. The oil pressure is still normal, and the engine temp is still normal. The car will start, if I hold the gas to the floor. However it will not run on it's own unless I am holding the gas. (Less than half throttle). And it will not rev higher thean 6 thousand rpm. If anybody can give me any good advise, it would be greatly apprieciated.
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#2
07-16-2004, 01:42 AM
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Re: My engine suddenly lost half of it's power!
A compression test would be the first thing I would try. Sounds like you MIGHT have lost an apex seal.
__________________
1988 10th AE Edition TII More mods then you have.
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#3
07-16-2004, 02:09 AM
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Re: My engine suddenly lost half of it's power!
check you injectors plugs. and injectors .
compresion test too .
__________________
HOLESHOT PERFORMANCE 91 Laser Rs 471 whp at 22psi pump scm-6152e 98 Eclipse GST 11.4 @ 121mph Stock T25/nitrous Jose Mendoza 
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#4
07-16-2004, 03:10 AM
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Re: My engine suddenly lost half of it's power!
thats about all you can do at this point, then get back to us
__________________
1989 RX-7 TII --- Just got rebuilt and street ported RB 3" dual exhaust, BNR stage 1 modified factory turbo, FCD, S-AFC II, 720cc secondaries, Aftermarket Turbo inlet duct w/K&N, Hawk HP+ pads HKS Blow-Off Valve, Stainless brake and clutch lines
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#5
07-16-2004, 11:27 PM
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Re: My engine suddenly lost half of it's power!
possibly a clogged up cat? idk just a guess
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#6
07-17-2004, 03:54 AM
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Re: My engine suddenly lost half of it's power!
yea your rotor probably got disconected, went down the header, and got stuck in your cat
__________________
1989 RX-7 TII --- Just got rebuilt and street ported RB 3" dual exhaust, BNR stage 1 modified factory turbo, FCD, S-AFC II, 720cc secondaries, Aftermarket Turbo inlet duct w/K&N, Hawk HP+ pads HKS Blow-Off Valve, Stainless brake and clutch lines
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#8
07-17-2004, 12:38 PM
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what does the AF read?
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#9
07-27-2004, 08:47 AM
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Re: My engine suddenly lost half of it's power!
I performed a compression test according to the Haynes repair manual. The upper front spark plug hole had a good reading. But the upper back spark plug hole had nothing. (compression guage did not have any reading on rear upper hole). What does this mean????
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#11
07-27-2004, 03:28 PM
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Re: My engine suddenly lost half of it's power!
yikes, typical rear rotor went bye bye. Time for a rebuild buddy.
 I've been trying to get my rebuilt engine re-rebuilt all summer. Fucker only got 900 mile before taking out a couple apexes
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#12
12-11-2004, 05:16 AM
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Re: My engine suddenly lost half of it's power!
put Ls-1 in it, hand down better than the ford 4.6
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#14
12-13-2004, 03:06 AM
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Re: My engine suddenly lost half of it's power!
"*put an LS1 bla bla bla *" ...............FUCK THAT !!!!!!
__________________
HOLESHOT PERFORMANCE 91 Laser Rs 471 whp at 22psi pump scm-6152e 98 Eclipse GST 11.4 @ 121mph Stock T25/nitrous Jose Mendoza
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