New guy needs some help

Topic: New guy needs some help (Read 3398 times) previous topic - next topic

New guy needs some help

Reply #15 – December 20, 2010, 07:53:57 PM

I dont know if it will make that kind of power with TBI. That could be whats wrong with it tho. If the motor is not stock the stock TBI system will not like it.

New guy needs some help

Reply #16 – December 20, 2010, 07:56:41 PM

so theoretically it could be a mustang 5.0 ho motor and maybe the tbi system can';t keep up to the engines a/f needs?

New guy needs some help

Reply #17 – December 20, 2010, 08:02:56 PM

That could be it but an HO doesnt make 300 hp. Its more like 225hp. With the cam profile I think it would run fine with TBI. It might be alittle lean but it should at least idol fine, it doent have a choppy cam and pulls good vacuum. It's EZ the figure out if it's an HO. What firing order are you running.

New guy needs some help

Reply #18 – December 20, 2010, 08:05:11 PM

eating dinner I'll take pics after

New guy needs some help

Reply #19 – December 20, 2010, 08:06:18 PM

Does it idol rough after it warmed up? The firing order might be wrong. There is an HO firing order and non-Ho firing order.
Non HO firing order/ 1-5-4-2-6-3-7-8
HO firing order/ 1-3-7-2-6-5-4-8

New guy needs some help

Reply #20 – December 20, 2010, 08:36:32 PM

I don't know if you can tell from the pics so I made a diagram.

New guy needs some help

Reply #21 – December 20, 2010, 08:37:19 PM

After pulling codes I would do a full tune up - even replace the parts that "look" new, that way you know they are new and know when they were replaced. Start there and see what happens. Also check all your vacuum lines for cracks and whatnot.

New guy needs some help

Reply #22 – December 20, 2010, 08:43:35 PM

That is definitely 15426378 non HO ...85 5.0 birds were TBI /CFI

New guy needs some help

Reply #23 – December 20, 2010, 08:46:40 PM

Yep, CFI, it is definitely a non-HO motor, as hypostang said. It may be a replacement motor, but probably from another Bird or Cat, or another 5.0 non-HO car.

New guy needs some help

Reply #24 – December 20, 2010, 08:51:35 PM

yea I kinda assumed it wasn't pulling 275-300 hp...but was hoping it was an HO:D

New guy needs some help

Reply #25 – December 20, 2010, 08:55:07 PM

Takes a lot of work (and money) to hit that 300 rwhp mark, even with the SEFI HO

New guy needs some help

Reply #26 – December 20, 2010, 08:56:18 PM

+1

All 5.0 models were either CFI or SEFI, I think they swapped to SEFI in 86. And that 275-300 HP is not true, though we all wish it was. Our cars make more in the 150 HP range. 275-300 is how much torque our cars make though!

My CFI car had a hard time starting cold, and it would stall out occasionally if you didn't keep the pedal down a little. A new MAP sensor fixed that for me. Does the car run fine when its moving? No bucking or choking?

New guy needs some help

Reply #27 – December 20, 2010, 09:08:05 PM

Yes runs fine when moving, but at cold idle I have to have my foot slightly on the gas. I couldn't say what rpm range it idles at doesn't have a tach. Well she does seam to settle at a certain speed sometimes. I say settle because you end up having to give her a little bit before she starts accelerating.

New guy needs some help

Reply #28 – December 20, 2010, 11:45:14 PM

Quote from: 20thanniver-ls;346364

Takes a lot of work (and money) to hit that 300 rwhp mark, even with the SEFI HO

Define "a lot of work (and money)". 300 rwhp is easily achieved for about $5000 or even less on a SEFI 5.0. Now having $5000 laying around to throw at an engine is a bit tough for most people, my self included

New guy needs some help

Reply #29 – December 21, 2010, 03:37:18 PM

Quote from: thunderjet302;346388

Define "a lot of work (and money)". 300 rwhp is easily achieved for about $5000 or even less on a SEFI 5.0. Now having $5000 laying around to throw at an engine is a bit tough for most people, my self included .

$5000 is a lot of money to put into a 20 + YR old car in one lump sum no matter who you are .