No Power going up hills

[sectlandscaping]

The truck has hesitation accelerating. If I go up a hill it will slow down to almost a stop. On the highway the rpms will jump up and down around 40 mph and will buck slightly or surge. It seems as if its downshifting. The truck has no low end power.

Things I did, new plugs and wires, cap and rotor, seafoam.

I'm thinking tps or map but I'm not sure. Is there a testing procedure for these? Or do you have any idea what the problem could be?


88 f350 460 fuel injected

 

[5.0Flareside]

first and easiest thing to do is pull codes..

Check out Oldfuelinjection.com

it'll tell you how to pull codes with a paper clip..

start from there..

 

[sectlandscaping]

first and easiest thing to do is pull codes..

Check out Oldfuelinjection.com

it'll tell you how to pull codes with a paper clip..

start from there..

A paper clip? Where am I suppose to get one of those? lol.. Ill try it out.

 

[sectlandscaping]

I got different numbers every time I did it. I have to have someone write while I count.

Heres some of them 23,24,25,32,56,66,67,68,81,82.

So Air management came up, tps, map, act, and evp.

Not sure what TOT is but its trans related and came up in 4 different codes.

The Neutral Safety switch came up too. I knew I needed that because it wont start with key and I replaced all the other parts.

 

[5.0Flareside]

holy crap..... uh hold on let me check and see what all i can kind of link together..

 

[sectlandscaping]

I just did it twice and came back with the same codes 24,67,81 for KOEO ,14,19 for CM.

24 ACT. Would MAP sensor fix this? Or is it something separate?

67 NSS. The reason I havent bought this yet is because its special order and I dont know if I have electric shift or not?

81 MAP. This looks to be the cause of the problems.

14 PIP. Not Sure about this?

Two or more successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a possible engine miss or stall.

29 VSS. This makes sense for the problem shifting but at the same time I read the map can do it too.

So I'm going to pick up the VSS and MAP. Not sure about the other parts yet. Any input would be appreciated.

 

[flareside_thunder]

Pip makes sense with your bucking description. Time for a new distributor. Go ahead and do the MAP sensor while you're at it then reset your ECM by disconnection your battery for 15 minutes.

 

[sectlandscaping]

Did the MAP, theres improvement with power and going up hills. I still have the engine shake and what sounds like misfires at 30mph +. I'm assuming that's related to the distributor.

 

[smokey]

That's what it sounds like.

 

[tedrow42]

If I'm not mistaken orilys or auto zone can tell you what these codes meen and parts 2 fix it

 

[sectlandscaping]

If I'm not mistaken orilys or auto zone can tell you what these codes meen and parts 2 fix it

they only do scans on 96 and up. On top of that they cant even tell me which part number to order when I know the part. They wouldnt be able to tell me if it was the pick up coil or distributor either.

 

[smokey]

Repull the codes again to see what ones you have now.
Then we can go from there.

 

[tedrow42]

they only do scans on 96 and up. On top of that they cant even tell me which part number to order when I know the part. They wouldnt be able to tell me if it was the pick up coil or distributor either.

That's odd they gave me a lil piece of mettal 2 stick in a deal and count then blinks or somthing
In my 92 but then again that was 7 years ago

 

[flareside_thunder]

Yup, that's the paperclip method. Http://oldfuelinjection.com

 

[tedrow42]

Any updates?

 

[cnmimike]

Have you checked the fuel filter? I had a simular problem last week.....changed the filter and now the truck runs fine. I have an EFI 460.