Power Max and EZ

[TNT]

Installed the TST Pwr Max adj with Blue Chip pump cover and Edge EZ. Plugged the Pwr Max into the MAP sensor, then the EZ, then the stock harness.

Went for a drive with the Pwr Max set on 3. Under heavy acceleration the truck started surging. Defenant power increase over the EZ by itself. Not as much as I expected.

Tried it on 5. About the same results.

Hooked up to my GN with a small load. (about 6500 lbs) made another run down the road. same thing. I could tell quite a bit of difference in acceleration over stock. But I still had the surging.

It feels almost like the box is fueling intermittantly. Yes I checked all the connections and did the trouble shooting that the TST instructions suggest. And yes I checked for voltage at the pump wire after I installed the cover. :{

I think I would be happy with this set-up if it would be a smooth acceleration, rather than the jerkiness I'm encountering.

By the way 32# boost max, less than 1000* pre turbo, fuel pressure allways above 13#

 

[Ramboy]

You might try reversing the PM and the EZ and plugging the EZ into the MAP sensor. It seems to work best for me.

 

[Blkdawdg]

Fuel Pressure

Do you have a fuel pressure gauge? My '01 did this when I had a blue box and not enough fuel. After removing all banjos and putting a BG220HR in, I haven't had this problem anymore.

 

[TNT]

Blkdawdg

I have a fuel presure gauge. It does not drop below 13#. I have also opened up the banjo fittings.

 

[MikeR]

Very strange indeed. I didn't have that problem running the same combo, but I did have the EZ jumpers set on 10psi fueling. I'd say move the jumper to the middle set of pins for 10psi fuel kick-in, and see if that helps.



-Mike

 

[Blkdawdg]

Me too!

My truck did the stumble with my banjos drilled out. It was only after I removed the banjos that the stumbling stopped.

 

[TNT]

Blkdawdg

Could the banjo's be making that big of a deal?

I am still running stock injectors:--)

 

[Blkdawdg]

It did for me.

I'm by no means an expert, but my truck would do the exact same thing yours is doing, until one of my "drilled-out" banjos actually broke and I was 5 hours from home, so I had to tap the VP44 and also the filter housing. On the way home I couldn't make the truck do the stumble. I would go to a local hydraulics fitting store in your area and replace the line between the filter housing and the VP44. It shouldn't cost more than $20 and it could possibly fix your problem.

 

[Todd T]

move the EZ in front of the PM3 first. then try just the PM3 if the surging persists.



lets see if big saint will jump in here. i think he has this setup too.



I PM'ed him

 

[Bigsaint]

I have mine piggybacked as follows... TST to Map, then EZ then OEM. Are you getting a check engine light/codes, presumably not as you have not listed any. I have the TST comp. box. Level 6 on mine = to level 9 on a standard TST is right on the edge of very radical fueling, if that makes any sense. What I get his a heavy shutter under real hard acceleration when set above level 6, if I ease into it there's no shutter until I release the go pedal, then I get a defueling shutter, again, most present in levels 7-9 on mine. If yours is the standard PM3 adj, you really shouldn't be feeling any thing but raw power in any setting up to 8, level 9 may give a hint of a shutter under real hard acceleration and a slight defueling shutter.



If you haven't, disconnect all map connections and put a small dab of dielectric grease on each of the 3 posts within each Map plug. Do this for all 3 Map plugs. Obviously, make sure that you are not 'keyed on', when disconnected the Map plugs or you will set a code/check engine light. This worked for a intermitent check engine light I was receiving, though I had no loss of performance. If that doesn't cure it, try replacing the banjo on the inlet to the VP44 with a bored out banjo, it sure won't hurt you performance.



You could also try removing the EZ and just running with the TST for a test ride. My EZ box is set on the most aggressive fueling jumper, if that helps. I tried running with the TST only to see if I would loose the shutter on the higher settings, it was still present in levels 7-9.



If none of this helps, give Mark a call at TST and ask for his insight. Hope I helped ya, this is all I know about the combo, in my limited experience.



Scott W.

 

[TNT]

Good advice

Thanks for all the good advice. Before I received the last couple of posts, I found an intermittent pump wire connection on the Blue Chip cover. I corrected that and went for a drive. Pretty much the came symtoms. Except this time the remote on the PM3 went completly blank for a second. I mean no yellow, no green, no level number. It came back on at 0 then went to 3 and stayed there. The main box is not eaisily accesible, so if the other suggestions don't work, I'll have to dig it out and mount it within eye sight untill I figure this thing out. :{

 

[Steve St.Laurent]

Given that latest sympton it sounds to me like you have an intermittent connection to 12 volt or you may be connected to the wrong wire.

 

[Bigsaint]

I agree with Steve, what did you use as your 12v source??? I tapped into the green wire with the black stripe, above the FF and slightly hidden by the seal for the hood.



Scott W.

 

[TNT]

Problem solved

Thanks for all the suggestions. I my have solved the problem. Found a bad factory crimp on the Blue Chip pump cover harness. Went for a test drive with no trailer and it seemed to perform as designed.

Broke the tires loose shifting into 3rd PM set on 8:--)

 

[Bigsaint]

AWESOME !!!!



Scott W.

 

[Chipstien]

TnT, glad it is fixed. Just for those that are thinking about the pump cover from Blue Chip... ... Make sure you turn that needle screw that taps the hot wire in plenty. I had surging and found that I didn't screw it in far enough. Just because you have power at the hot wire sitting in the driveway doesn't mean you will be good while driveing. And also when I was troubleshooting and checked the wire it tested fine. It wasn't untill I used trial and error that I found the problem. Boy was I sweating bullets thinking it was the Injection pump going out. :{

 

[TNT]

pump cover caution

As Chipstien said the Blue Chip pump cover screw can have a loose connection, but test good with truck not running. A WORD OF CAUTION is over tightening can break the circuit board. So experiment a little at a time. Mine is screwed in 1/2 turn farther than the recommended starting point, for now.

My $. 02