Just bought a 1989 F250 460 EFI, ZF 5 SPD, with 128,000 miles from the original owner, who special ordered it from Ford.

After accelerating up to speed then letting off the gas fowr a few seconds, POW!!!. Is this due to a restriction in the exhaust? I've read that the stock exhaust is VERY restrictive. A late 80's early 90's Ford trademark.

I'm thinking about putting the Banks PowerPack system on it.

http://store.bankspower.com/Categories.aspx?Category=ba8f3b82-412b-4e03-800b-ca2cbb55e2ac

Anyone done this, what were the results........

Thanks

 

read codes, do tune up, find out what is wrong before you go throwng money into an exhaust.

get to know the truck before you start modifying it.

welcome to fte.

now research your problem on the forum.

that can't be a cheap exhaust and i think it is overkill.

 

Sounds like an over rich mixture, and the TPS is not shutting fuel off on time, the fuel is exploding in the manifold. If the truck has an anti-backfire valve, it could be the cause if it is opening too late.

 

I most definitely will, I don't have money to burn, will do, Thanks, and I'm sure it's not.

I'm waiting on a quote from Banks. The same system for my 99 454 Suburban was $1875. I ended up just adding a couple of Flowmaster Super 40's and dualing it out the back. (I like the drone, call me crazy.) It already had dual CATs though. How could a free flowing exhaust be overkill? Especially on a Big Block.

The guy I bought the F250 from said he's replaced the CAT twice. Finally his mechanic hogged out the CAT. It passed emmisions, but I wonder if this is causing a problem.

I do plan on tracking this problem down first, but know that the restrictive exhaust certainly does not help the performance.

It is running rich. TPS? Thottle Position Sensor? Where Do some have anit-backfire valves on them? Where is this located.

Sorry guys, I'm new to the truck thing. I am more familiar with carbed 60's vintage muscle.

For the time being I'm just a

 

first off to have an explosian inside the pipes
you must have gas and o2
must be unburnt fuel from lack of cats.
also must have a leak in the exhaust
does not have to be a lot of each
check for codes and TEST your sensors and harness
www.fordfuelinjection.com for proper procedures

 

Thanks for the link. I will start crawling into the bowels of knowledge. I want to learn alll about Ford fuel injection. Hoping to redo my 65 Mustang with a fuel injected motor swap one day. Shouldn't take more than a couple of hours right................just kidding. It will be a long journey with many facets, I'm sure. thanks again to all you guys.

 

the truck can get by with a much cheaper and just as good exhaust.

 

Point me in that direction, please......

 

www.jegs.com
flowmaster has a good sys.
add a high flow cat if wanted
will keep you under 300.00

 

mhg answered before i did.

 

For those interested to know. Banks Power Pack System for 1989 F250 460 standard cab long box. $1,863.00 delivered. Not including installation. Sounds steep, but, it's all Stainless, 5/8" header flanges, 3.5" exhaust.

PowerPack® system


F-250, F-350 & SUPER-DUTY PICKUP: PowerPack liberates power enough for a truck-and-a-half! Look for top gains of +68 hp and +94 lb-ft torque and coddles your wallet with an overall 15% mileage improvement. Stainless-steel PowerPack provides better performance in all categories, from take-offs to freeway merging and towing big loads. Banks-enhanced Ford V-8s out-pace trucks in stock trim, eliminating 24% from the 0-to-60 mph distance.

I don't think you'll get "AS GOOD", an exhaust for 300.00 bucks IMHO. The torque tube headers alone are worth quite a bit.

$1,175.00 with Y-Pipe. (This is where most of the gains come from.)

I have alot of research, code deciphering, knick knack replacing, tune up work, alignment, tire issues to work out before I worry about the exhaust.

 

that is what i suggested in my first post so it sounds like you are on the right track.

when i was in design college we had classes on propaganda and advertising.

always take claims from manufacturers with a grain of salt.

 

Checked codes, got 63, 177. Replaced the TPS sensor along with the following:
ECT sensor
ACT sensor - (it was ugly)
IAC Motor - (very sooty)
O2 sensor - (very sooty as well. I couldn't believe it only has 1, just before the flange to the catalytic convertor)
Spark Plugs Motorcraft ASF42C - gapped 0.44 - (it had Mighty Core, never heard of them, gapped @ .035 )
MSD Cap and Rotor I had laying around, never used.
Coolant temp sensor (it was bad, gauge not reading, works good now)
Water Pump - (removed belts and found the awful screaching sound I've been trying to track down, bad pump bearings, almost frozen.)
MAP sensor - (bought a cheapo Wells unit at Autozone, had a surging issue on acceleration, put the original back, runs great. Don't buy cheap for certain things. Took it back, got my $60 back. Must be a reason the Motorcraft part costs $169)

Now I have a couple of other minor issues.

Hard starts. I have to give it just a bit of gas for it to start and idle. Once I do, it idles right up runs like it should.
Still rich. Not as bad as before the tune-up, but still rich.

I have a fuel filter to put on tomorrow. Could this cause the hard starting? Timing possibly off, I'll put a timing light on it tomorrow as well. It runs great after the hard starts though. Leaking injectors? Any other ideas?

(Also got new tires today. Front-end alignment, and brakes to follow in the next week. My kids will be driving this beast, gotta make sure it's safe)

Looking at this exhaust, I can install myself.
http://store.summitracing.com/partdetail.asp?autofilter=1&part=FLO%2D17198&N=700 +4294923429+4294908331+4294840123+4294908309+42949 24930+4294922451+115&autoview=sku