I have a 91 5.0 tbi that seems to not want to spin the tires just makes a weird humming noise and no burning rubber. Tried adjusting the timing and then tried spinning the tires but nothing. A few months ago I had to change out the computer and distributor has a new map sensor and tps sensor bought new injectors,fuel pump,fuel filter and still nothing but then again she does have over 200,000 miles so maybe I need to replace the engine not sure what to do and help would be appreciated. And when she shifts into first its kinda hard and it sounds like it's misfiring a little not to bad. Any suggestions plz

 

Your 305 made 170 horsepower when new (IE: not much). Less 200k miles of wear, an automatic transmission(?), and 2.73 rear gears, I would not be at all surprising if it could not spin the tires in any substantial way.


FYI...timing spec is 0. Anything more that 4* or so is detrimental to performance.

 

Could it do it before and not now? You need one of two things, more power or less traction. Look at it this way, you won't lose a race because you blew off the tires. I kid, I kid, seriously now, that thing probably tired and didn't have much to start with. Its time to do the community proud and breathe new life into that engine.

 

My LO3 has problems with no power also.. That's why I'm getting this old boy ready

 

Not even a Corona will make the L03 faster.


Good beer though.

 

I'm just gonna rebuild the engine

 

Change the cam and throw away your exhaust system and replace with a 3in system with good headers and y-pipe and it will be a different animal. Or better yet toss the engine and find a LO5 or L31.

 

200k miles on a 305 TBI isn't that much. The low power keeps them alive for a long time. You mentioned that you changed the distributor and "messed with the timing". Are you sure you installed the distributor correctly? Where you adjusting the timing with the EST disconnected? If not, your timing is way off and the car is limping. Don't throw any more parts at the car, that just introduces more variables. To echo what was stated before, was this decline in power noticed as soon as you started messing with parts? Or has it been a slow decline? I would baseline everything. Fuel pressure, timing, etc etc.