Test drove potential FD purchase, stumbling; need help!
06-20-13, 05:49 AM
#1
Test drove potential FD purchase, stumbling; need help!
I checked and test drove a 1994 RX7 5 speed touring which was bone stock. It got a complete engine and turbo rebuild 8k miles ago as shown on receipt by Rotary Doctor, that was in 2010 though. The previous owner pulled the motor to have the engine bay painted after the rebuild.
During idle it sounded a little like misfire and when getting off the clutch if I don't give it enough gas it has a pretty hard time, I have to clutch in and rev it up to keep it alive. It's fairly stumbly throughout the rev range.
If the compression test comes out exceptionally well is it a safe assumption that some of the vacuum lines may have been reinstalled incorrectly and have come loose?
Thanks!
During idle it sounded a little like misfire and when getting off the clutch if I don't give it enough gas it has a pretty hard time, I have to clutch in and rev it up to keep it alive. It's fairly stumbly throughout the rev range.
If the compression test comes out exceptionally well is it a safe assumption that some of the vacuum lines may have been reinstalled incorrectly and have come loose?
Thanks!
06-20-13, 08:25 AM
#2
No. Could be any number of things. And just because it's 'bone stock' now, doesn't mean it always was. It's not uncommonl for sellers to pull all the aftermarket bits and sell them separately after reinstalling all the stock parts. It almost sounds like it has a lightened flywheel...which of course is alot more work to R & R before selling.
06-20-13, 08:36 AM
#3
No. Could be any number of things. And just because it's 'bone stock' now, doesn't mean it always was. It's not uncommonl for sellers to pull all the aftermarket bits and sell them separately after reinstalling all the stock parts. It almost sounds like it has a lightened flywheel...which of course is alot more work to R & R before selling.
I guess what im asking is; as long as compression checks out is it more than likely something fixable that isn't a serious issue?
Very true. Didn't even consider that he could've done that too.
06-20-13, 12:39 PM
#4
If it's just an 'occasional' miss at idle, hell...mine does that and it runs fine otherwise. If it's a steady miss, or so frequent as to affect rpm noticibly than it's something else. Anything from worn plugs and/or wires, to bad gas, to sticky injectors and on.
A soft clutch pedal feel is mostly a function of the pressure plate. But having to rev higher to avoid stalling while starting from a stop, and (IIRC) wanting to stall on decel are some side-effects I've heard from a lightended flywheel.
A soft clutch pedal feel is mostly a function of the pressure plate. But having to rev higher to avoid stalling while starting from a stop, and (IIRC) wanting to stall on decel are some side-effects I've heard from a lightended flywheel.
06-20-13, 03:03 PM
#5
If it's just an 'occasional' miss at idle, hell...mine does that and it runs fine otherwise. If it's a steady miss, or so frequent as to affect rpm noticibly than it's something else. Anything from worn plugs and/or wires, to bad gas, to sticky injectors and on.
A soft clutch pedal feel is mostly a function of the pressure plate. But having to rev higher to avoid stalling while starting from a stop, and (IIRC) wanting to stall on decel are some side-effects I've heard from a lightended flywheel.
A soft clutch pedal feel is mostly a function of the pressure plate. But having to rev higher to avoid stalling while starting from a stop, and (IIRC) wanting to stall on decel are some side-effects I've heard from a lightended flywheel.
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