i have a 1988 gxl and it only has 95,000 mile motor seems to be good. Iam new to this type of engine (13B), it also has a 3" single exhaust. SOOOO my problem is that after the warm up my idle drops low like 500 rpm and it starts to bogg. I did notice that i am missing the air duck tube between the air box and bumper. And no power at all on acceleration. it feels like when i gun the gas the car is not going anywhere. i have been in a rx7 just like mine before and it was all stock and it was ten times faster. I dont know iam lost. If you have any ideas that would be great. i changed the plugs and air filter and fuel filter and it got a little better but still the same problem.

 

First thing first, do a compression test. Does it bog at around, say, 3500 RPM?

 

what would be good compression for this motor?

 

Minimum spec in the FSM is 85 psi per chamber, but in practice you'd like to see more like 100+ psi. For example, my engine has 110-120 psi per rotor face. It's also important that you test with a fully charged battery, with the throttle open and with the engine warmed up to get the most accurate numbers.

Compression testing: https://www.rx7club.com/showthread.p...mpression+test

 

ok i did the compression test and both have 90 psi..... so i think it is good. i did notice that i have low oil pressure around 20 psi, but when i start driving it it goes up. any ideas

 

Next you should check your 5/6 aux ports.