84hernandezc10

I finished my swap to 84 c10 l33 5.3/4l60e cranks up fine but doesn't have any power not sure what the problem is maybe tac throttle body maf not real sure any help would b great

i r teh noobz

iTrader: (4)

Your post isn't very easy to read, nor does it explain your problem very well.

I'm reading that as "it starts and idles but has no power when I drive it." My first guess would be that the DBW throttle is not working. See if the blade is moving and scan for trouble codes.

When I got my swap running, I used a rag as a makeshift air filter. It would barely go over 15 until I took that off.

99MUSTANG5.3L

Have you checked your fuel pressure at the rails? Should be 55psi.

84hernandezc10

Yes it starts up fine and after initial start up I can rev her up just fine like it should but after that she idles down and then I can't rev it up that high. I put another tac module but still the same.

84hernandezc10

Have not checked the fuel pressure yet

99MUSTANG5.3L

I had this issue when I first got my swap finished. I hooked up a pressure gauge and drove it around the block. It didn't take long to see the drop in fuel pressure. I moved my inline fuel pump back to the tank to correct my issue.

84hernandezc10

I'm running a walbro in tank pump. With the wix filter regulator. Is there a way to hook the gauge to the Schrader valve

BanditDave

iTrader: (11)

How do you have it hooked up at that rails? You can get a guage fitting if it is the Russell or the like fitting that slips on the end of the rail. Slip the gauge fitting in between the fuel rail adapter and hose end and you can tap into that...I believe the standard fitting is 1/8"NPT.

84hernandezc10

Yes I'm using the slip fit Russell connections

84hernandezc10

Sorry I have two threads of the same problem. My computer didn't show that the 1st thread was made. So I started another one.

84hernandezc10

Check fuel pressure it is showing 55 lbs. took the truck down to oriellys and got three codes p0332 knock sensor p2120 app sensor 1 p2138 app sensor 1-2 correlation. I swapped a known good working pedal and tac module and it still did the same thing.

ls1nova71

iTrader: (4)

Just swapping in known good parts won't fix your problem if it's an incompatibility problem. You need to make sure that you have the correct TAC for the engine. What year is the engine?

84hernandezc10

Engine is an 06 l33 5.3 the tac came from psi and the computer came from wait4me performance the throttle body came from another 06 l33 5.3 from a member here. The parts i borrowed were from a 07 classic. My tac module worked on his truck. I'm going to look for loose wires tomorrow

84hernandezc10

Well seemed to have found my problem. Was told it couldn't been the throttle body from the dealership so I got a new one helped a little. Then started messing with the wires and found that if I wiggle the harness that connects into the tac module from the pedal it would rev up just fine. I got the wires to hold enough to drive down the street and back with decent power. So tomorrow I'm gna look around and find one.

84hernandezc10

Well maybe it wasn't the throttle body. I replaced it and it seemed to have ran good but it didn't fix my problem. I even replaced the tac harness. I was messing with the wires off the pedal and some how it worked great went around the block got home and shut it off went to turn it back on and it did the same thing. Maybe it's in the tune. I'm all out of ideas any more suggestions

Blackpony

iTrader: (6)

Sounds like a wiring issue. A tune is either going to work or not.

84hernandezc10

Yea I was kinda thinking so to. I might just order a harness and get it over with.