WOT bogging
#1
Junior Member
Thread Starter
WOT bogging
I recently bought an FC that had a known bad OMP. Replaced it and the lines, as well as the vacuum hoses under the UIM. the car starts great, idles great, but bogs down under anything more than a 10% gas pedal load. if i keep the pedal extremely light, I can get through the gears without the engine bogging. As soon as i try to give it more gas than the 10% it bogs down, sputs and backfires. I let off the gas after the bogging and goes back to the perfect idle.
I have checked the ohms for the full Range TPS and it is in spec, Gas is good, fuel pump and filter are good and I cleaned the engine bay grounds. Could it be my injectors?
I have searched the forum, but all have fallen short. I am stumped and need help on what could possibly be causing this issue?
I have checked the ohms for the full Range TPS and it is in spec, Gas is good, fuel pump and filter are good and I cleaned the engine bay grounds. Could it be my injectors?
I have searched the forum, but all have fallen short. I am stumped and need help on what could possibly be causing this issue?
#3
Information Regurgitator
According to this post in this thread the OMP takes the ECU with it much of the time when it goes bad.
https://www.rx7club.com/2nd-generati...7/#post7028866
https://www.rx7club.com/2nd-generati...7/#post7028866
#4
Junior Member
Thread Starter
It is a 1990 GXL NA. My idiot lights appear to not be working so I dont know if it is throwing a code.
#5
Junior Member
Thread Starter
According to this post in this thread the OMP takes the ECU with it much of the time when it goes bad.
https://www.rx7club.com/2nd-generati...7/#post7028866
https://www.rx7club.com/2nd-generati...7/#post7028866
edit* will pull again and recheck to see if any resistors are burnt up.
Last edited by RotardedNooby; 06-18-19 at 05:30 PM.
#7
Junior Member
Thread Starter
I finally found a working idiot cluster and got it hooked up. Tried to pull codes and it gave the solid check engine light. After doing some research that seems to indicate a a bad ecu, as some of you said earlier. I have an new ecu in the mail and will be back with results when it arrives.
Trending Topics
#8
Senior Member
My car has the same problem after an injector change. I bought new ones from ebay (denso), the car starts fine (cold and hot) and idles perfectly at 900 rpm. Two or three times it boosted up fine until red line and but after that I changed gears and it started bogging and backfiring.
I tried to adjust my TPS and it has a fine 1 kOhm on idle but has a reading of 6.3 kOhm on WOT. Also the mazda error code tester throws a TPS error and an intake air temp switch. The intake air switch cables and harness got ripped after all these years and I used solder to fix them.
Any suggestions? Is this a bad TPS or intake air temp switch? Could it be something else?
Grounds maybe? I had many grounds and I don't know if the mechanic placed them back after the injector replacement.
Fuel pump? I have a halmeter on board and when it bogs the reading goes to full red (lean).
RotardedNooby did you found solution to your problem?
I tried to adjust my TPS and it has a fine 1 kOhm on idle but has a reading of 6.3 kOhm on WOT. Also the mazda error code tester throws a TPS error and an intake air temp switch. The intake air switch cables and harness got ripped after all these years and I used solder to fix them.
Any suggestions? Is this a bad TPS or intake air temp switch? Could it be something else?
Grounds maybe? I had many grounds and I don't know if the mechanic placed them back after the injector replacement.
Fuel pump? I have a halmeter on board and when it bogs the reading goes to full red (lean).
RotardedNooby did you found solution to your problem?
#9
Junior Member
Thread Starter
My car has the same problem after an injector change. I bought new ones from ebay (denso), the car starts fine (cold and hot) and idles perfectly at 900 rpm. Two or three times it boosted up fine until red line and but after that I changed gears and it started bogging and backfiring.
I tried to adjust my TPS and it has a fine 1 kOhm on idle but has a reading of 6.3 kOhm on WOT. Also the mazda error code tester throws a TPS error and an intake air temp switch. The intake air switch cables and harness got ripped after all these years and I used solder to fix them.
Any suggestions? Is this a bad TPS or intake air temp switch? Could it be something else?
Grounds maybe? I had many grounds and I don't know if the mechanic placed them back after the injector replacement.
Fuel pump? I have a halmeter on board and when it bogs the reading goes to full red (lean).
RotardedNooby did you found solution to your problem?
I tried to adjust my TPS and it has a fine 1 kOhm on idle but has a reading of 6.3 kOhm on WOT. Also the mazda error code tester throws a TPS error and an intake air temp switch. The intake air switch cables and harness got ripped after all these years and I used solder to fix them.
Any suggestions? Is this a bad TPS or intake air temp switch? Could it be something else?
Grounds maybe? I had many grounds and I don't know if the mechanic placed them back after the injector replacement.
Fuel pump? I have a halmeter on board and when it bogs the reading goes to full red (lean).
RotardedNooby did you found solution to your problem?
Mine ended up being that the OMP took out the ECU when the stepper motor went bad. This is a common occurrence according to the forum.
Last edited by RotardedNooby; 07-26-19 at 07:04 PM.
#10
Junior Member
Thread Starter
I finally found a working idiot cluster and got it hooked up. Tried to pull codes and it gave the solid check engine light. After doing some research that seems to indicate a a bad ecu, as some of you said earlier. I have an new ecu in the mail and will be back with results when it arrives.
Thread
Thread Starter
Forum
Replies
Last Post
cluosborne
2nd Generation Specific (1986-1992)
3
12-25-07 11:43 PM
SilverFlash
3rd Generation Specific (1993-2002)
11
01-02-02 03:47 PM
rhino37
2nd Generation Specific (1986-1992)
19
10-17-01 07:55 AM