rpm up and down

[tintoy]

Need help. 4g63 n/a. New timing belt set correctly. Replace the tps, biss. Clean the throttle and injectors. New fuel filter. Fuel pump and fpr working properly. Timing set at 10 degrees. Still the rpm is up and down and the engine will die. Any suggestions.? /ubbthreads/images/graemlins/confused.gif thank you.

 

[galant651]

check the IAC motor, also could be a vacuum leak. does it hiss?

 

[MellowVR4]

Quoting tintoy:
Need help. 4g63 n/a. New timing belt set correctly. Replace the tps, biss. Clean the throttle and injectors. New fuel filter. Fuel pump and fpr working properly. Timing set at 10 degrees. Still the rpm is up and down and the engine will die. Any suggestions.? /ubbthreads/images/graemlins/confused.gif thank you.




If this is a N/A engine i would set the timing at 5degrees just because the n/a's dont have a knock sensor. check you iac, or just eliminate the fiav completly.

 

[tintoy]

Iac and fiav.? Where is it located.?

 

[EHmotorsports]

Throttle body. Fiav has two small coolant hoses connected and the iac has the 6 prong connector.

 

[MellowVR4]

Quoting tintoy:
Iac and fiav.? Where is it located.?



Its attached to the throttle body, the bottom half that is.

 

[AllanL]

maybe silly question, but is you intake snorkel connected to the MAF/MAS and your throttle body?

 

[galant651]

yes. should be right after your air filter.