ok i have a 1988 13b and when i start it up it revs up to 3.000rpm stays there for about 10 seconds then dies whats wrong?????

need help its driving me nuts!!!

 

Check to make sure the AFM is plugged in and that the harness is in good shape.

 

AFM? and do you mean the hole wireing harness?

 

sorry kinda half asleep yes it is plugged in and the harness is good. but the guy that had it before me took out the air box and just put on a k&n cone filter. but it ran just fine when he had it. till he let it sit for 6 months then it started doing this. but i checked the plugs wires and coils and there all good and throwing spark. could it have anything to do with the TPS?

 

It could just be the fact that it sat for 6 months. Sometimes they need a little bit of time to come alive again.

Can you keep it running by pressing the gas?

 

yes i can keep it running when i push on the gas i can hold it as low as 1000rpm i just never kept it running for very long ill try keeping it running for awhile tomorrow and see what happens but when i hold the gas it pulsis between 1000rpm and 1200rpm is that a vacum leak?

 

It could be a vacuum leak. If it is, it will be a very big one.

 

well the ACV had the upper nut missing. and it had a 1/4" gap in it. and i think that is whats wrong. with the vacum leak that is. but i took that off got a new filter. and gonna buy a block off plate today and see if that helps with anything.

 

Yes, that would be a big vacuum leak. Also check the black intake tube from the AFM to the throttle body.

Once you do get it running, build some kind of cold air box around the filter.

 

ok will do thank you guys very much for all your help

 

Ummmm I'm surprised noone mentioned the cold start. All Fcs do this to help warm them up and keep from flooding. Its normal

 

He said it dies after it revs...