Help troubleshooting throttle
10-06-11, 09:06 PM
#1
Help troubleshooting throttle
hi guys,
so 3 or so months ago i bought an 85 gsl-se with a rebuilt motor, ported via pineapple racing templates, upgraded suspension, brakes, lightweight flywheel, etc. really haven't had the chance to drive it much since i still have to finish installing the widebody kit but i did take it out a few weeks back.
while driving, i noticed that in between shifts, lifting on the throttle and engaging the clutch at the same time would make the revs go up about 2-300 rpms higher from where i lifted. seems like the throttle cable was still pulled and slow to returning to idle position. i briefly looked at the throttle cable and there is about a 1/16 to 1/8" give to it. anything else i can adjust? revs aren't coming down as quickly as i would hope. tia.
btw, rats nest removed as well as air pump (i believe) and A/C...there are just 2 pulleys, crank and alternator.
so 3 or so months ago i bought an 85 gsl-se with a rebuilt motor, ported via pineapple racing templates, upgraded suspension, brakes, lightweight flywheel, etc. really haven't had the chance to drive it much since i still have to finish installing the widebody kit but i did take it out a few weeks back.
while driving, i noticed that in between shifts, lifting on the throttle and engaging the clutch at the same time would make the revs go up about 2-300 rpms higher from where i lifted. seems like the throttle cable was still pulled and slow to returning to idle position. i briefly looked at the throttle cable and there is about a 1/16 to 1/8" give to it. anything else i can adjust? revs aren't coming down as quickly as i would hope. tia.
btw, rats nest removed as well as air pump (i believe) and A/C...there are just 2 pulleys, crank and alternator.
Last edited by craaaazzy; 10-06-11 at 09:08 PM.
11-17-11, 01:45 PM
#2
bumping this up as my searching has yet to find a post with similar problems. thought it may be the TPS and bought myself 2 little light bulbs but looking at my engine compartment, i can not find the green connector FMS is talking about (rat's nest has been removed by previous owner)
11-17-11, 01:53 PM
#3
Oil Leak
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2-300 rpms doesn't sound that uncommon to me, not that i've driven a lot of rotaries, but when you think of how much power you've applied to the engine without a load it won't necessarily stop revving when you let off.
11-17-11, 01:59 PM
#4
unless you lift off and then clutch in, its bound to happen like that simply because when you shift normally, you dont take your foot completely off the throttle, my miata does it, my 1st gen does it and its simply the driving style. You lift but not completely to maintain rpms or at least that how i drive. thats not an issue you should worry about. if you still think is an issue with the car post a video of the tach while it happens and we can asses the issue better.
11-17-11, 03:51 PM
#5
Depending on your carb configuration (you didn't specify), it may be equipped with a device called a "dashpot," the whole purpose of which is to slow throttle closure below about 3000 RPMS. Which in turn prevents the afterburns (backfires) rotaries are prone to when the intake closes too fast.
If it's misadjusted, it can affect higher RPM ranges.
If you don't have one, then that's not it.
If it's misadjusted, it can affect higher RPM ranges.
If you don't have one, then that's not it.
11-17-11, 07:25 PM
#7
It's definitely not my driving style. Even tried lifting gas pedal prior pressing the clutch in and it does the same. My buddy's 13b does not do the same.
No carb as it is an SE. I have researched on the TPS and have even bought 2 light bulbs to test but the problem is I can not find the green connector to connect to. Is it because the previous owner removed the rats nest?
No carb as it is an SE. I have researched on the TPS and have even bought 2 light bulbs to test but the problem is I can not find the green connector to connect to. Is it because the previous owner removed the rats nest?
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11-18-11, 04:34 PM
#9
Oil Leak
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It's definitely not my driving style. Even tried lifting gas pedal prior pressing the clutch in and it does the same. My buddy's 13b does not do the same.
No carb as it is an SE. I have researched on the TPS and have even bought 2 light bulbs to test but the problem is I can not find the green connector to connect to. Is it because the previous owner removed the rats nest?
No carb as it is an SE. I have researched on the TPS and have even bought 2 light bulbs to test but the problem is I can not find the green connector to connect to. Is it because the previous owner removed the rats nest?
11-18-11, 07:10 PM
#10
someone confirm this for me please: https://www.rx7club.com/showthread.p...=rats+nest+tps
11-19-11, 06:23 PM
#11
as for the TPS, please help me identify where i should connect my lights to. here are some pics of my set up:
the green connector in the middle of this pic is female. i thought i would have to find a male green connector, no?
11-22-11, 09:45 AM
#12
drove the car today and here is what i noticed...
idle is good and stable, at about 1200 rpm's.
when driving, the amount the rpm's jump up is dependent on the load on the engine. the higher the load, the more it will rev past where i let off. if i take my foot off the gas pedal for about a second and then push the clutch in, it does not rev up.
still looking for help please
idle is good and stable, at about 1200 rpm's.
when driving, the amount the rpm's jump up is dependent on the load on the engine. the higher the load, the more it will rev past where i let off. if i take my foot off the gas pedal for about a second and then push the clutch in, it does not rev up.
still looking for help please
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