full boost, but low power im stumped! IN NEED OF SOME HELP!!
hey guys i have been searching the fourms but i cant find much on this topic.
so i have a 92 rhd fd, and for a while now have been experiencing low power, she doesn't feel as fast as she used to. so she seems to boost fine i have a defi boost gauge, but when i open her up she just seems to have less power thats really noticeable through the first turbo, but even the second feels a bit low as well. i thought it had something to do with my ecu because my tach was reading high rpms when you could feel and hear that the actual rpms were revving lower. ( this happened periodically. not all the time) so i swaped out my ecu with a pfc and the rpms seem to be normal now ( only one run since i put it in) but im still feeling low power. what are some possible reasons for this? i have installed greddy dual intake rx7 store fmic ( greddy replica) 5 zigen cat back apexi pfc |
Check all your couplers and connections on the charge air piping, and do a boost leak test especially if the problem started around the time you installed that fmic. Its possible to have a boost leak and still register full boost on a gauge. As long as the car is running healthy otherwise with no other symptoms than low power I would check that first and also look into possible exhaust restrictions like a bad/clogged cat.
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What's the weather like? My car feels slow when its humid or hot outside. My car feels like a damn rocket ship if the temp outside is anything below 50 degrees.
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Originally Posted by DriftDreamzSS
(Post 11154897)
Check all your couplers and connections on the charge air piping, and do a boost leak test especially if the problem started around the time you installed that fmic. Its possible to have a boost leak and still register full boost on a gauge. As long as the car is running healthy otherwise with no other symptoms than low power I would check that first and also look into possible exhaust restrictions like a bad/clogged cat.
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Originally Posted by Oscypek1007
(Post 11154934)
What's the weather like? My car feels slow when its humid or hot outside. My car feels like a damn rocket ship if the temp outside is anything below 50 degrees.
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Do you have an ignition amplifier? Check your leading coil.
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You can try to unclog your cat. Take it out, and shake it. If you hear loose stuff rattling, it may be clogged. I had very good success unclogging mine by shaking it until all the loose stuff came out the ends of the pipes. It took a while, but was well worth the time spent.
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Originally Posted by DriftDreamzSS
(Post 11154897)
Check all your couplers and connections on the charge air piping, and do a boost leak test especially if the problem started around the time you installed that fmic. Its possible to have a boost leak and still register full boost on a gauge. As long as the car is running healthy otherwise with no other symptoms than low power I would check that first and also look into possible exhaust restrictions like a bad/clogged cat.
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^ Incorrect.
If the boost leak is smaller than the amount of air that the turbos can flow while still maintaining full boost, it will not register. The wastegate will compensate by not opening as much. |
Originally Posted by RENESISFD
(Post 11156829)
^ Incorrect.
If the boost leak is smaller than the amount of air that the turbos can flow while still maintaining full boost, it will not register. The wastegate will compensate by not opening as much. |
lika a dead cat ;)
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ya couldn't find any leaks, so i found a guy who lives just down the street from me who has a cat for sale, im going to pick it up this week and throw it in and see if it makes a deference! fingers crossed!
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Originally Posted by goodfellafd3s
(Post 11155886)
do you have an ignition amplifier? Check your leading coil.
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