89 EFI Bronco question
Thread Starter
|
New User
Joined: May 2020
Posts: 1
Likes: 0
89 EFI Bronco question
I’m pretty well versed in engine build but this is the first SBF I’ve had with EFI. I’ve learned that asking people who have already done it is worth a lot more than trial and error.
I picked this 89 bronco up pretty cheap and left some room to spend a bit. It’s a 351w /C6 running stock drivetrain. 31 inch tires. The lower end looks good, solid compression, no oil burning even under towing in the mountains. BuT the power is crap. I did a basic tuneup and it didn’t help. Plugs look like it’s running a bit lean, but otherwise no clues. Stock exhaust with no cat and a rather old flow master. Sounds like it’s got a mild exhaust leak but I haven’t gone after it yet. Trying to decide if headers are worth it.
I’m wondering what the “usual suspects” are for this motor. Is it worth upgrading the EFI, or will swapping to a carb be better in the long run? I’m building it as a tow vehicle, not an off road monster, but I’m a hot rodder at heart so it won’t upset me if it sounds a bit grumpy. I’ve got some experience with BBFs and the idea of scrapping it and dropping in a 429 isn’t off the table.
I appreciate thoughts and experiences.
thanks
LC
I picked this 89 bronco up pretty cheap and left some room to spend a bit. It’s a 351w /C6 running stock drivetrain. 31 inch tires. The lower end looks good, solid compression, no oil burning even under towing in the mountains. BuT the power is crap. I did a basic tuneup and it didn’t help. Plugs look like it’s running a bit lean, but otherwise no clues. Stock exhaust with no cat and a rather old flow master. Sounds like it’s got a mild exhaust leak but I haven’t gone after it yet. Trying to decide if headers are worth it.
I’m wondering what the “usual suspects” are for this motor. Is it worth upgrading the EFI, or will swapping to a carb be better in the long run? I’m building it as a tow vehicle, not an off road monster, but I’m a hot rodder at heart so it won’t upset me if it sounds a bit grumpy. I’ve got some experience with BBFs and the idea of scrapping it and dropping in a 429 isn’t off the table.
I appreciate thoughts and experiences.
thanks
LC
Thread
Thread Starter
Forum
Replies
Last Post
gmccantsjr
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
2
Jan 26, 2003 10:25 PM
