helppppp with my first tbi carb

[johnathon1968]

hello im new here. i just got a 1988 chevy van. with 305 engine and tbi carb.im trying to find out how to adjust the idle on it. thanks for any help.

[email protected]

 

[camok5]

Well the TBI really isnt a carb, its closer to fuel injection and if your idle is off there might be something else wrong, I am sure someone else with better knowledge than me will help. Also if you explain whats wrong with the idle it will help others to answer your question.

 

[lrazer]

the computer controls the idle there is a manual way to adjust the throttle stop but it will usually only work to adjust the idle up, because if you adjust it down past what its at the computer will just hold the idle up

 

[johnathon1968]

Well the TBI really isnt a carb, its closer to fuel injection and if your idle is off there might be something else wrong, I am sure someone else with better knowledge than me will help. Also if you explain whats wrong with the idle it will help others to answer your question.

thanks for your reply. the problem is the idle seems to be very high. the engine is running fast at idle. and 1 ore thing the oil light stays on at idle.but when you push on the gas it goes out.

 

[BoDapper]

If you read this thread it will take you through the possible causes for high idle- and how to adjust the idle if none of the possibilities work.

Good luck.

CV

http://www.thirdgen.org/techbb2/showthread.php?s=&threadid=272791

 

[johnathon1968]

What All Would I Have To Do To Put A Carb On Here..

 

[pumpkin]

If it is idleing too fast, then it is most likely a vacume leak. Quite common for the throttle body base gasket to leak.

 

[camok5]

If you put a carb on it then it wont be smog legal anymore.

 

[stkcode]

What All Would I Have To Do To Put A Carb On Here..

Why would u want to revert to a carb?

 

[johnathon1968]

Why would u want to revert to a carb?

ok i got the idle working right.. it was a vacume leak. now i have a new problen. i cant get any oil pressure . i put a new oil guage but still no pressure. what do you think is going on.

 

[ProJunkRacing]

well i would not run the motor with no pressure is what i would suggest

 

[1985_K5_Silverado]

ok i got the idle working right.. it was a vacume leak. now i have a new problen. i cant get any oil pressure . i put a new oil guage but still no pressure. what do you think is going on.

Are you positive the replacement gauge is good? Are you positive that your sending unit is OK? How about the connection between the two?

This is slightly different, but gauge-related: Wwhen I bought my K5, the coolant temp gauge didn't work. It wasn't the sending unit at fault, nor was it the gauge, but rather a wiring problem. When a PO had done a "home rebuild" job on the 700R4 and had bolted it back up to the engine, they had tightened down a bellhousing bolt head with the coolant temp wire underneath! Apparently, no one thought that a dead coolant temp gauge was worth debugging, but it's been fixed now by replacing the wire.