Rough Idle, Apex Seals? Blown Engine? HELP!
#1
Rough Idle, Apex Seals? Blown Engine? HELP!
Car is idling rough, but in the right area ~720-750rpm. Boost is normal, and all vacuum lines are good. Idle adjust screw does nothing, ECU does not put out error codes. Should I get a compression test at a Mazda Dealership to see if the seals or bad or if the engine is blown? I mean.. if I Had a blown engine, wouldn't I have a lot more problems then just straight idle? Engine runs nice with a lot of power as long as it isn't idling. I've thought it might be Fuel Injectors, Fuel Filter, Apex Seals (anyone have a guide on replacing these?), or a blown rotor. What should I Do?? ANyone in Arizona want to give me a hand, please lemme know!
-Darren-
-Darren-
#5
Original Gangster/Rotary!
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Re: Rough Idle, Apex Seals? Blown Engine? HELP!
Originally posted by dhahlen
Apex Seals (anyone have a guide on replacing these
-Darren-
Apex Seals (anyone have a guide on replacing these
-Darren-
#6
Racing is life!
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Seems like lots of idle problems lately, i've got it to.
Hunting idle, low vacume, loping at idle. The Gotham boys tested my compression in the mid 6's. Car still runs fine like yours. (for now) Just not as much power as it should have.
Hunting idle, low vacume, loping at idle. The Gotham boys tested my compression in the mid 6's. Car still runs fine like yours. (for now) Just not as much power as it should have.
#7
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Re: Rough Idle, Apex Seals? Blown Engine? HELP!
Originally posted by dhahlen
Engine runs nice with a lot of power as long as it isn't idling.
Engine runs nice with a lot of power as long as it isn't idling.
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#8
Uhh..
The Vacuum moves around 12-14inhg it won't stay at a solid 15inhg. It has power below 2000rpm, but not as much as it should have... so yes... a bit weak. DOes the upper intake manifold shake violently? Well.. depends on what you call violently... it does shake a bit... not really violent... but it does shake a small amount... noticable if you look at it.
#9
Original Gangster/Rotary!
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Re: Uhh..
Originally posted by dhahlen
The Vacuum moves around 12-14inhg it won't stay at a solid 15inhg. It has power below 2000rpm, but not as much as it should have... so yes... a bit weak. DOes the upper intake manifold shake violently? Well.. depends on what you call violently... it does shake a bit... not really violent... but it does shake a small amount... noticable if you look at it.
The Vacuum moves around 12-14inhg it won't stay at a solid 15inhg. It has power below 2000rpm, but not as much as it should have... so yes... a bit weak. DOes the upper intake manifold shake violently? Well.. depends on what you call violently... it does shake a bit... not really violent... but it does shake a small amount... noticable if you look at it.
I'd recommend that you drive the car as little as possible and definitely don't boost it.
I had similar symptoms once, and one seal on the front rotor was cracked in half (although it held in together) and another seal had a chip off of the tip. The good news was that all the housings and both rotors were ok.
#10
Damn..
Yes, the car will be at a constant idle. BUt the vacuum will oscillate around 12-14inhg rapidly. It's a small movement, but it won't stay at a solid 15inhg. Cheap rebuild...? I have a hoist... I'd rather save the money... how difficult and how much will this cost me to do on my own, compared to taking it to a shop?
#11
Mr. Links
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Re: Damn..
Originally posted by dhahlen
I have a hoist... I'd rather save the money... how difficult and how much will this cost me to do on my own, compared to taking it to a shop?
I have a hoist... I'd rather save the money... how difficult and how much will this cost me to do on my own, compared to taking it to a shop?
#13
Original Gangster/Rotary!
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Re: Shitty...
Originally posted by dhahlen
NO power below 2000rpm, over 2000rpm it's fine... sound like an apex seal?
NO power below 2000rpm, over 2000rpm it's fine... sound like an apex seal?
#14
don't race, don't need to
I'm going to throw in the throttle position sensor and related attepts by the ECU to regulate idle using the ISC which will give fluctuations in the vacuum signal.
It's an easy check before going the compression check route, which is also an easy check.
It's an easy check before going the compression check route, which is also an easy check.
#16
Mr. Links
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Re: Uhhh
Originally posted by dhahlen
Forgive me for being a dumbass...ECU using ISC? What is an ISC, and how do remedy this problem? I am doign the comp later this afternoon, what should I check before that?
Forgive me for being a dumbass...ECU using ISC? What is an ISC, and how do remedy this problem? I am doign the comp later this afternoon, what should I check before that?
Check this thread:
https://www.rx7club.com/forum/showth...hreadid=196607
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