not trying to beat a dead horse, but....
06-17-07, 01:02 AM
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not trying to beat a dead horse, but....
I've recently picked up a '87 turbo 2 which has the dreaded bouncing/ rough idle
problem. I've read every post in every thread about this problem. So far I've checked for vacume leaks, adjusted the idle with no luck, checked the bac valve adjustment I've just about all the way through the list of possible causes for this idle issue. The stock boost guage isn't working could this have something to do with it? I also found what appears to be a fitting for a vacume line next to where the oil filter goes, is this suppose to be hooked up to something? Also wondering which vacume line to tap into for aftermarket boost/vacume guage.
problem. I've read every post in every thread about this problem. So far I've checked for vacume leaks, adjusted the idle with no luck, checked the bac valve adjustment I've just about all the way through the list of possible causes for this idle issue. The stock boost guage isn't working could this have something to do with it? I also found what appears to be a fitting for a vacume line next to where the oil filter goes, is this suppose to be hooked up to something? Also wondering which vacume line to tap into for aftermarket boost/vacume guage.
06-17-07, 01:05 AM
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tps
You didn't mention that you checked that the TPS sensor is adjusted within specifications. More than likely it is the TPS then I would look into vacum leaks. You can go to fc3spro.com for more info.
06-17-07, 10:44 AM
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How about explaining exactly what the bouncing is. In other words the idle speed when the engine is hot, and how much *bounce* b/t the high rpm and the low rpm in hundreds. And how many times a second does it go up/down?
Also, read this: http://www.teamfc3s.org/info/articles/idle.html
And is this one of those cars where all of the vacuum lines and solenoids have been removed?
And be alert. Your saying the stock boost gauge isn't working WHEN your in boost. YOU are saying it does not move at all. If this is the case, then you need to take action and find out if the pin 2B of the ECU is/is not getting a voltage signal from the boost sensor. No signal equals a ECU that knows not that your in boost, so the timing etc will be corrupt during boost.
Also, read this: http://www.teamfc3s.org/info/articles/idle.html
And is this one of those cars where all of the vacuum lines and solenoids have been removed?
And be alert. Your saying the stock boost gauge isn't working WHEN your in boost. YOU are saying it does not move at all. If this is the case, then you need to take action and find out if the pin 2B of the ECU is/is not getting a voltage signal from the boost sensor. No signal equals a ECU that knows not that your in boost, so the timing etc will be corrupt during boost.
Last edited by HAILERS; 06-17-07 at 10:51 AM.
06-17-07, 11:06 AM
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And go to this thread: https://www.rx7club.com/forum/showth...ht=intercooler
Remove the intercooler and put it on the back shelf. Install in its place pieces of PVC piping as shown in that thread. Now you can idle the engine and see what you are doing. Spray starter fluid at the joints etc. You can also adjust the tps to output one volt dc at its green/red wire by backprobing that wire with a meter and adjusting the tps screw.
Remove the intercooler and put it on the back shelf. Install in its place pieces of PVC piping as shown in that thread. Now you can idle the engine and see what you are doing. Spray starter fluid at the joints etc. You can also adjust the tps to output one volt dc at its green/red wire by backprobing that wire with a meter and adjusting the tps screw.
06-21-07, 01:27 AM
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Just got this figured out tonight, turns out the air intake duct hose
had a big split where it connect to the turbo inlet housing. Guess I
should of took it off the first time I checked the intake system for leaks.
(the split in the hose was on the bottom of course, out of sight)
Huge relief not to be vibrating at stop lights anymore and having poor
fuel mileage. Thanks for everyone's helpful input. Anyone know if there is
any aftermarket versions of this part or is it strictly a dealer item?
had a big split where it connect to the turbo inlet housing. Guess I
should of took it off the first time I checked the intake system for leaks.
(the split in the hose was on the bottom of course, out of sight)
Huge relief not to be vibrating at stop lights anymore and having poor
fuel mileage. Thanks for everyone's helpful input. Anyone know if there is
any aftermarket versions of this part or is it strictly a dealer item?
