Car wont hold idle when it is warm
#1
Car wont hold idle when it is warm
I am tired of searching thread after thread to find the answer, i have almost narrow down most of problem.
Here is the symptom: It warms up fine for 2min then idles jumps between 1.2 to 2.5k rpm until it is fully warm, it idles normal around 750-900rm for 30sec before stalling out.
This is on a 88 TII
Things I have done: New Harness, 750cc injectors, rtek 1.7, RB full exhaust, ported wastegate, walbro fuel pump.
The idling issue didnt start happening until i got a custom cat put onto my car. And yes the smog pump is still hook up
-I have checked vac leaks and there is none (im going to replace all vac lines for safety)
-Checked for leaks around the AFM area
-Checked the BAC, ACV
-Checked around the twin scroll actualator area too
I have brought it into the shop, a reputable shop for rotary, they said its my ecu and injectors. I had never had a problem like this b4 prior till put the custom cat in.
Now I am thinking it could be the thermostats. Any other ideas?
Here is the symptom: It warms up fine for 2min then idles jumps between 1.2 to 2.5k rpm until it is fully warm, it idles normal around 750-900rm for 30sec before stalling out.
This is on a 88 TII
Things I have done: New Harness, 750cc injectors, rtek 1.7, RB full exhaust, ported wastegate, walbro fuel pump.
The idling issue didnt start happening until i got a custom cat put onto my car. And yes the smog pump is still hook up
-I have checked vac leaks and there is none (im going to replace all vac lines for safety)
-Checked for leaks around the AFM area
-Checked the BAC, ACV
-Checked around the twin scroll actualator area too
I have brought it into the shop, a reputable shop for rotary, they said its my ecu and injectors. I had never had a problem like this b4 prior till put the custom cat in.
Now I am thinking it could be the thermostats. Any other ideas?
#2
F yo couch!
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perhaps your running your engine to rich and your fowling out, or for that matter to lean and your not exploding enough,
check to make sure your ecu is maped correctly, i dont know why it would be a thermostat on an idling problem....cooling and ignition have nothing to do with eachother unless im missunderstanding what your saying
check to make sure your ecu is maped correctly, i dont know why it would be a thermostat on an idling problem....cooling and ignition have nothing to do with eachother unless im missunderstanding what your saying
#6
Also I swapped out my old tps, because it has hesitation problem when you throttle. So Tps is calibrated up to spec.
So I'm narrowing things down.
-It couldn't be electrical - new engine harness - nothing be tamper with.
-It couldn't vac leak, i have checked and have checked, and i even have a shop checked for me
-I swapped almost 5 BAC and tested and have the same result.
-Checked for leaks around the AFM area, I even have the shop did it.
-I have the shop checked the ACV for and it works.
-I have a working TPS in the car.
What else could it be?
So I'm narrowing things down.
-It couldn't be electrical - new engine harness - nothing be tamper with.
-It couldn't vac leak, i have checked and have checked, and i even have a shop checked for me
-I swapped almost 5 BAC and tested and have the same result.
-Checked for leaks around the AFM area, I even have the shop did it.
-I have the shop checked the ACV for and it works.
-I have a working TPS in the car.
What else could it be?
#7
BWAAA
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my guess wouldve been the tps, but u beat me to it
if i can remember, i think my friend with his 88t2 had a similar prob, ill try n get a hold of him thru a pm to see what his prob was
have u tried to pull codes yet?
if i can remember, i think my friend with his 88t2 had a similar prob, ill try n get a hold of him thru a pm to see what his prob was
have u tried to pull codes yet?
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#12
F yo couch!
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are your injectors and fuel connections ok? perhaps your getting to much fuel if the injectors are letting to much through or your not getting enough, like bad fuel filter, clogged= injector, rail, crimp in line, bad conection at pump, hell clogged pump. basically did you check all your fuel system?
#13
are your injectors and fuel connections ok? perhaps your getting to much fuel if the injectors are letting to much through or your not getting enough, like bad fuel filter, clogged= injector, rail, crimp in line, bad conection at pump, hell clogged pump. basically did you check all your fuel system?
The injectors are new from RC and less than 100miles is on them (the correct ones for my model. N333 Saturated 750cc RC nippon denso style INjectors), they have been replace by Rick's Rotary which is a reputable shop. Fuel Filter is still good, and Im running a new walbro Pump and i was running a slight rich like the rtek 1.7 ecu is program and still run rich and i can smell it.
THE FUEL SYSTEM HAVE BEEN CHECKED A DOZEN OF TIME AND LIKE I SAID BEFORE THE CAR WAS RUNNING FINE UNTIL A CUSTOM CAT WAS PUT IN OR SOMETHING ELSE COULD HAVE HAPPEN OR GONE WRONG. I CAN GUARANTEE IS NOT THE FUEL SYSTEM
#17
87 Series IV RX7
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Maybe check the Crank Sensor. I had a corroded connection, it would start and rev normally, then just die. I cleaned the connection and that fixed it
#23
F yo couch!
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have you tried pulling the cat yet? i know you said you need to pas smog but if your 6 months over due whats about 2 more days with no cat?
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