89LX convert acceleration problem

a few possible things:

clogged fuel filter
fuel pump is dying
bad fuel pressure regulator

could be a bad coil, but doubtful.

My DD is doing something similiar, but i have eliminated a few things. I can hear the pump click on when i turn the key on - and cold sometimes it'll take 15 to 30 secongs to build up pressure. If I try to start it before i hear the pump shut off, no start. After it does start - instant restarts are no problem. I replace the regulator this weekend with a new one (I was hoping this was the problem) while I was changing my stock injectors to 17 lbs ones robbed off a Buick in the junkyard. Didn't solve the problem - but the car runs much better with the new injectors - computer almost has learned the new settings. I suspect my problem lies in the pump and i think yours might be too, but replace the filter first - mine was pretty clogged. It's cheap and easy to do this 1st!

As for a possible coil thing - my 93 has coil packs and at one point i had a bad coil that made it run like crap till it got up to a certain temp and then ran like it should - usually about mile 3 in the trip. But your 89 doesn't have a coilpack, so I vote for it being a fuel (or lack thereof) issue.

85L6Coupe said:

Never changed EFI fuel filter before. I know pressure has to be relieved before opening line.
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Click to expand...

Well, yes and not really. Replacing it isn't too bad - just crawl under where the back axle area is and it's right there. I removed the lines from the filter - you do get a little bath - have something ready to catch the fuel if you want, but it didn't spray all over the place - but then again - I let it sit overnight so I suspect the pressure was bled down.