4AGE 16V Bluetop HIGH IDLE
Posted: Sun Sep 15, 2019 7:26 pm
Car:
'86 Corolla GTS / 4AGE 16V Bluetop.
Mods:
EGR Delete + Hardlines removed (w/ rear intake manifold block off plate)
AW11 Manual Rack conversion
Pod Intake Filter
TRD 4-2-1 Exhaust
Stock bottom and top end.
Keeping TVIS, A/C & Charcoal Canister
Problem:
Car idles at 2500RPM+ constant even after fully warmed (20+ mins @ 80F weather). AFAIK, all vacuum lines have been re-routed correctly regarding the EGR delete. The charcoal canister is connected to the lower port on the (sideways) BVSV at the back of the head. The upper port is routed to port 'C' on the throttle body. Port 'R' and 'E' are plugged on the TB. The ports on BVSV standing vertically at the back of the head are all capped. Port 'N' is connected to the electric idle VSV near the AFM which is Tee'd into the A/C Idle Up Valve. The check valve on the TVIS has been removed and hooked directly into the vacuum diaphragm. The two power steering ports on the IACV are capped.
All vacuum lines has been replaced. I've check all lines for vacuum leaks and did not find any. I've also doused everything intake/vacuum related with carb cleaner and listened for a change in idle and didn't notice anything.
At this point, I have no idea what is causing the high idle issue. My last resort is removing the IACV under the TB and diagnose that under boiling water. If that happens to not be the case, what can cause a high idle issue that isn't vacuum related? Also, not sure if this might be directly related to the IACV, but when I unhook the connector to my TPS, the idle floats between 1500-2000RPM. I faintly remember these two issues correlating with one another. Hopefully, the IACV is the culprit but I wouldn't be able to confirm until a week or two from now since I only have time to work on the car during weekends.
In the meantime, any and all guru'ness appreciated! -Kudos!
'86 Corolla GTS / 4AGE 16V Bluetop.
Mods:
EGR Delete + Hardlines removed (w/ rear intake manifold block off plate)
AW11 Manual Rack conversion
Pod Intake Filter
TRD 4-2-1 Exhaust
Stock bottom and top end.
Keeping TVIS, A/C & Charcoal Canister
Problem:
Car idles at 2500RPM+ constant even after fully warmed (20+ mins @ 80F weather). AFAIK, all vacuum lines have been re-routed correctly regarding the EGR delete. The charcoal canister is connected to the lower port on the (sideways) BVSV at the back of the head. The upper port is routed to port 'C' on the throttle body. Port 'R' and 'E' are plugged on the TB. The ports on BVSV standing vertically at the back of the head are all capped. Port 'N' is connected to the electric idle VSV near the AFM which is Tee'd into the A/C Idle Up Valve. The check valve on the TVIS has been removed and hooked directly into the vacuum diaphragm. The two power steering ports on the IACV are capped.
All vacuum lines has been replaced. I've check all lines for vacuum leaks and did not find any. I've also doused everything intake/vacuum related with carb cleaner and listened for a change in idle and didn't notice anything.
At this point, I have no idea what is causing the high idle issue. My last resort is removing the IACV under the TB and diagnose that under boiling water. If that happens to not be the case, what can cause a high idle issue that isn't vacuum related? Also, not sure if this might be directly related to the IACV, but when I unhook the connector to my TPS, the idle floats between 1500-2000RPM. I faintly remember these two issues correlating with one another. Hopefully, the IACV is the culprit but I wouldn't be able to confirm until a week or two from now since I only have time to work on the car during weekends.
In the meantime, any and all guru'ness appreciated! -Kudos!