Mid to high range loss of power
11-28-10, 12:09 PM
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Mid to high range loss of power
I have read the FAQ about bad battery grounds and checking the 5th and 6th ports that could cause this loss of power. BUT my question is, where are the 5th and 6th ports and how to i test that they are working?? And also the grounds that i need to check... I followed battery ground wire and it looks like it stays wrapped up in the loom until it disappears under the intake mani... Please help, i can't stand the RX7 being this much of a turd any more. It's becoming a problem to even pass people on the high way anymore
11-29-10, 10:55 AM
#2
for grounding issues.
http://www.aaroncake.net/rx-7/grounding.htm
boooya!
see aaroncake's holy bible to rx7 buddy.
and i think what you are having is the notorious 3800 rpm hesitation. search it. i hop that helps
http://www.aaroncake.net/rx-7/grounding.htm
boooya!
see aaroncake's holy bible to rx7 buddy.
and i think what you are having is the notorious 3800 rpm hesitation. search it. i hop that helps
12-01-10, 10:54 PM
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Thanks a bunch. Read both articles fully and i will check all grounds and ports tomorrow either during my lunch break tomorrow at work or after work and i will report back on here with results. Thanks again
12-02-10, 10:30 PM
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Ugh, ok.... Well, after a long night off wrestling with sensor testing when engine hot and engine cold, TPS, CAS, Pressure sensor are all good and within spec. Adjusted TPS to where it should be and when cold the car runs fine other than needing the 5th and 6th ports cleaned. BUT when the car gets to full temp, things start to happen. It hesitates anywhere from 1/8 throttle and onward. Feels like fuel is being fully shut off. If i free rev the engine it will sometimes make it higher than other times but if i hold it when it shuts off it will drop to about 1000rpms and rev back up and cut off again. The only thing i can think of is AFM going to crap when it gets warm or hot. Or Bad ECU ground under the intake mani. I cleaned all the other grounds other than the ECU and the one on the tranny due to lack of tools (left all the good stuff at work 
) So tomorrow i am going to try to get those grounds cleaned up to rule those out of the question if that doesn't solve the problem. This is unlike any problem i have read about or seen but it definitely is an electrical problem when engine is hot. And it seems to get worse the longer i drive it during one period of time..
) So tomorrow i am going to try to get those grounds cleaned up to rule those out of the question if that doesn't solve the problem. This is unlike any problem i have read about or seen but it definitely is an electrical problem when engine is hot. And it seems to get worse the longer i drive it during one period of time..
12-03-10, 10:22 AM
#6
Ugh, ok.... Well, after a long night off wrestling with sensor testing when engine hot and engine cold, TPS, CAS, Pressure sensor are all good and within spec. Adjusted TPS to where it should be and when cold the car runs fine other than needing the 5th and 6th ports cleaned. BUT when the car gets to full temp, things start to happen. It hesitates anywhere from 1/8 throttle and onward. Feels like fuel is being fully shut off. If i free rev the engine it will sometimes make it higher than other times but if i hold it when it shuts off it will drop to about 1000rpms and rev back up and cut off again. The only thing i can think of is AFM going to crap when it gets warm or hot. Or Bad ECU ground under the intake mani. I cleaned all the other grounds other than the ECU and the one on the tranny due to lack of tools (left all the good stuff at work ) So tomorrow i am going to try to get those grounds cleaned up to rule those out of the question if that doesn't solve the problem. This is unlike any problem i have read about or seen but it definitely is an electrical problem when engine is hot. And it seems to get worse the longer i drive it during one period of time..
) So tomorrow i am going to try to get those grounds cleaned up to rule those out of the question if that doesn't solve the problem. This is unlike any problem i have read about or seen but it definitely is an electrical problem when engine is hot. And it seems to get worse the longer i drive it during one period of time..does your ground that is behind the intake on the tranny have a lil black resister on it?
12-03-10, 10:31 PM
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I don't think my ground has a resistor on it. I cleaned the strut tower grounds (the lower one and one under Trailing coil) and there was no difference in how the car runs. I am going to clean the 5th and 6th port tomorrow if i find time and see if that helps, also trying to get down to the ECU ground under the intake mani because that is what sounds to me could be the big problem. I spotted it and the wire tips coming from the insulation are kind of a grayish light green color. Also, i rechecked the TPS and noticed it was way out of adjustment so i adjusted it and now it is perfect in tune, Still no difference. CAS, TPS, EGR, Plugs, coils, injectors, and MAF are all good. Is there any chance there is a Temp sensor freaking out and telling the ECU some goofy readings? Car runs good when engine is cold-warm. At full temp after a few minutes it progressively gets hard to get over 2k rpms without it breaking up and feeling like fuel is being cut off
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