sjx40250
NAXJA Forum User
- Location
- Alexandria VA
Need Advice on next steps to solve poor performance
I have a friend who bought an 88 for $800 with only 140K. It is not perfoming like it should. Here is what I have found
After starting it up, the idle tends to hunt for a while, like the A/C was being turned on and off. So the RPM readings are between 1300 and 900. it settles at about 1000.
When taken on the road, it accelerates OK but lacks the typical power. When climbing a hill, it is really slow in acceleration and doesn’t down shift like I think it should. Manually putting it in 1-2 helps but doesn’t really solve the problem.
He was complaining about the performance soon after he bought it. I suggested he clean the TB thoroughly, which he did. He did not adjust the TPS. He put on a glass pack and a new filter. The vehicle did pass emissions testing.
I tried to adjust the TPS but found that when probing the three wire connector, I could not get a voltage reading for the out put! Got on-line and found the thread saying to probe the TCU connector instead. Found 4.64V on input and was only able to get to 4.15 at maximum adjustment. This did not fix the problem.
My next steps would be to replace the AIS, TPS and CPS.
Oh, the vacuum reading is about 17.
Any recommendations on what the next steps should be?
I have a friend who bought an 88 for $800 with only 140K. It is not perfoming like it should. Here is what I have found
After starting it up, the idle tends to hunt for a while, like the A/C was being turned on and off. So the RPM readings are between 1300 and 900. it settles at about 1000.
When taken on the road, it accelerates OK but lacks the typical power. When climbing a hill, it is really slow in acceleration and doesn’t down shift like I think it should. Manually putting it in 1-2 helps but doesn’t really solve the problem.
He was complaining about the performance soon after he bought it. I suggested he clean the TB thoroughly, which he did. He did not adjust the TPS. He put on a glass pack and a new filter. The vehicle did pass emissions testing.
I tried to adjust the TPS but found that when probing the three wire connector, I could not get a voltage reading for the out put! Got on-line and found the thread saying to probe the TCU connector instead. Found 4.64V on input and was only able to get to 4.15 at maximum adjustment. This did not fix the problem.
My next steps would be to replace the AIS, TPS and CPS.
Oh, the vacuum reading is about 17.
Any recommendations on what the next steps should be?