The acynoms I got were from the Hayens Repair Manual. CMFI is Central Muliport Fuel Injection and CSEFI is central Sequential Electronic Fuel Injection.

 

I have purchased the MPFI and will install today. Thanks .

 

It figures that I had it backwards in my posting.....I should know better than to think without coffee on a Saturday morning.

Good to hear you got the good one....much, much better than the poppet style nozzles.

 

Well, I installed the new injector spider with fuel regulator. It runs better but it still hesitates once in a while during the day. It still stumbles once in a while during the day. I think there still must be a vacuum leak somewhere, or could it have something to do with the transmission? Every once in a while it will stumble, ie; I will be holding a steady speed and the RPMs will increase about 400 then go back down. Just not sure in which direction to go from here. I appreciate all the input everyone has given.

 

Are you still getting the code.
Check tranny fluid for the slipping issue.
Vacuum leaks like to manifest as surging at idle or high rpm at idle.

 

OP. what is the P0300 code in English?

 

multiple random misfire