Surging issue with Quadzilla connections

[JThiessen]

For the last month or so I've been battling a surge issue. When I put my truck on cruise control, it doesn't hold a steady speed - you can feel it apply power, coast, apply power, coast... . with the Xzillaraider on level 3, you can watch the boost gauge change by @4lbs, but no change in rpms. Drop down a level, and you can barely feel it, and the boost gage doesn't move. Turn the box off, and I cant feel it anymore. The first time it happened, I wiggled and jiggled all of my connections to make sure they were there, and after that the problem disappeared. Then I had go in to get my steering gear replaced, so I removed the box, and after reinstallation, the surge was back. So last night before I went home, I re-did all of the connectors. Then on the drive home, it felt like I was loosing fuel pressure. At the second stop light, the truck completely died, and wouldn't start. It would start to fire, then just died off like it didn't have anymore fuel.

I got out and quickly re-jiggled all of connections, and luckily it fired up. THen this morning - it wouldn't start again. So one by one I went through the connections, and it turned out to be the blue connector common to the motor - as opposed to the one on the pigtail.

And on the drive to work, the cruise surge was gone. Apparently "solved"... . but I think I just cured symptom. Is it possible that there is something loose in the connector? Previously, all the connections were solidly in place - making me think that its just luck of the draw if its getting a good 100% contact. Why did I only notice it only on cruise? Is it because the computer tries to control the rpms so closely as opposed to my foot and the inherent variation with it?

 

[bill8333]

You might have one connector backwords. Check the threads Quad posted something about what your feeling and has a picture of the connector that can be installed wrong.



Bill

 

[JThiessen]

Yes, I've seen that thread (No start after fueling up). In fact I posted about my surge at cruise back in April, and I've been following the posts to see if anyone else had the same issues.



His scenario sounds just like mine did yesterday. But I didnt get a check engine light. Havent checked for codes yet.

 

[JCleary]

I have a Quad race, but have not experienced the symptoms you have had.



Interesting thing is...



That I had a surge issue when my truck was totally stock. Running stock airbox, exhaust, and 285 BFG's, my truck would constantly surge while the cruise was on. It was super annoying.



After switching to 35's (and the Quad shortly thereafter) I have not had any surge issues at all. I was really concerned due to the fact that I had them before, but somehow the problem cleared up.



After reading your post, maybe it had something to do with a bad connection on my truck before I installed the box???

 

[qzilla]

This is a shot in the dark, but if you did have a bad connection in the connector that plugs into the factory map sensor then it could theoretically cause this issue.



Here is how and why.



We are looking at the Map signal. We do many things based on this signal inclduing fueling and boost fooling. When we look at a signal the connection is broken and we basically have an IN and OUT. IF we are getting funky numbers IN, then we still have to put numbers OUT. Theoretically if there was a bad connection we could instigate the surging based in fluctuating boost numbers.



Its a long shot but who knows? We can always swap harnesses if you want.

 

[RLB]

I had that same surge last time I was on the freeway with the cruise set at 75. I have a race box which was set at the 60 HP setting. I don't have gages yet so I couldn't see what all was going on. (Still holding out for the Quad monitor) The truck seems to run fine when not in the cruise control mode. It has never set off a code. I'm a little lost on what to do about it. It isn't a big deal, just annoying. I tried to search for the thread your talking about so I can check my connection for being backwards but no luck. Quad can you re-post the picture of the connection to look for? Any other ideas? I'm open to suggestions.



Thanks

Randy

 

[HOBrian]

My truck did this without the box. But only going down a hill

 

[qzilla]

I had that same surge last time I was on the freeway with the cruise set at 75. I have a race box which was set at the 60 HP setting. I don't have gages yet so I couldn't see what all was going on. (Still holding out for the Quad monitor) The truck seems to run fine when not in the cruise control mode. It has never set off a code. I'm a little lost on what to do about it. It isn't a big deal, just annoying. I tried to search for the thread your talking about so I can check my connection for being backwards but no luck. Quad can you re-post the picture of the connection to look for? Any other ideas? I'm open to suggestions.



Thanks

Randy

Does it speed up and down on flat ground? I might believe that the 130hp setting could surge even though it should not, but surging in 60hp is a big suprise??? How much does it do it? Is it something very subtle or when you are going up or down a hill?



You problem is not the connector. BUT here is the link.

http://www.quadzillapower.com/nda-beta/6.0L Plugs.pdf



You do not need to remove the bottom key, just know that it is not a latch.





Quad

 

[JThiessen]

RLB - if I was you I'd check that map sensor connection. Like I said, mine seemed to be on tight, and just taking it off, and putting it back on the same way seemed to cure it.



Quad - I'm still going to run mine for a while longer to see if it comes back. Everytime this has occured has been when I've pulled the entire system off. Its gotta be something in that connector.

 

[RLB]

Thanks Quad for the link. It is a very subtle surging, I was cruising on flat ground for miles when it was doing it. I cannot feel it when the cruise is off. There are no other indications of any problems. The box is very smooth on the power delivery and plenty of it when I am not in cruise control mode. I will double check all my connections. Thanks for the help guys.



Randy

 

[RodneyNichols]

Surging with Edge Juice

Well I have the same surging with the cruize on, but I have and Edge juice, so there must be a bad connection with mine. I'll double check everything tonight.

 

[coobie]

I have been running the quad race box on my 2004 for about 2 months now,it has been trouble free with the surge issue. Love the HP & mpg,s gained with this box. coobie

 

[JThiessen]

well its back again. Truck died again on the drive to work, and again, no codes. Getting a new harness to TRY (I'm not totally convinced that that is the issue, but I also cant come up with any other driver given that Re-doing the connectors gets it running again).

 

[Diesel Nut]

No codes at al???? I've been having some problems with my quad race but everytime it dies it tells me what made it go stupid. I get a check engine light and several codes.

As far as the surging, I may have an answer for you guys. In the middle of the 2003 model year, D/C changed the TPS from the early model that was on the side of the motor like the older engine to the newer set up under the drivers side battery. They also changed sensors, to one more sensitive. When I had my Banks 6 crap that thing would surge 7psi with my foot on it, but not in cruise. If you have an Auto, you are using vacuum to run your cruise, whereas my manual is al electronic. The sensitive tps run by a possible overly aggressive vacuum seloniod for the cruise could be making overly large corrections to maintain speed, and the fact that you are getting more power at any given throttle position doesn't help. Just a thought . . . .

 

[Hokey]

I ran the Quad -x Race version for a couple of weeks until it started throwing an engine code. Quadzilla had me send it back, which I did. They sent it back to me and said it had checked out all ok but that they reset something to help ensure it wouldn't throw a code at higher rpm's. tried it again for about 70 miles as it became progressively worse and wasn't certain I could limp back home with it surgeing and bucking at low rpm in every setting. I took it back off and truck runs fine. Waiting to hear back from quadzilla again. The stuff is in back the box worse than when I sent it in. response and service have been excellent and still hope to have a successful resolution to this dilema...

 

[JThiessen]

I've got to apologize - I re-checked for codes after work and VOILA! P0236... .



Sorry if my misinformation has caused any additional bewilderment (especially on the part of Quad and Co. )



When I tried to start it this afternoon, no go. Tried the connectors again, no luck. So I just removed the whole thing, and it started right away.

 

[Diesel Nut]

As far as the bucking and surging at low rmps and all, sounds like we are all having the same problem, also, mine will slowly die, and if I clutch it, it's toast. Once it stalls, will not start untill I take the box off and use the bypass plug. And, it's intermittant. Can put the box back on and it'll be fine for a little while, then it'll do it again, randomly. Sound like you guys?

Stan at Quad has been wonderfull about helping me out with this and seeing to it I'm not left in the dark. This is the second box we have tried, as the first one did the same thing. Quadzilla seems very motivated to take care of the customer and the problem, so my hats off to them. Now, we just need to figure out why my truck and the quad box won't play nicely. . . . . .

 

[JThiessen]

Yep, sounds just like mine.

Both times mine stalled while driving has been towards the end of my drive, after I've gotten off the freeway. And both times, I must have sensed something wasnt quite right 'cause for some reason my focus turned to the guages to see everything looked right, then a few minutes later, I would actually be able to feel the motor start to cut out. Momentum/backpressure must have kept it running until I got off the freeway. The second time it happened I was better prepared for it, and I kept the rpms up as long as I could by shifting into low. But as soon as I had to let off - it stalled (right in the entrance to the parking lot!). I also am happy with the QUAD, and dont have any regrets yet. Sometimes things just have a gremlin or two. Heck, I dont know for sure that it is the box/wiring yet, so I'm not making any judgements.

 

[qzilla]

Hokey,



What problem are you having? If you are having a problem it is much more valuable than to just gripe. I would gladly help you if I knew what your problem was? Just saying it does not work will not get any support.



Did you have a problem like the two guys above you? I am only aware of these two problems. We tried to send one of them a wire harness a long time ago and they opted to wait. I amnot exactly sure what we are doing about Diesel Nut?



It is also really hard to keep up with user names and real names. Please forgive us for that.



I think you will also see by looking around that our issues are few and far in-between and all of them get fixed.



Quad

 

[ECappleman]

Sorry to hear it guys.

I have an 03. 5 HO auto, with the standard box.



Just took a long drive last weekend. 60hp setting and cruise at 70mph.

No problems.



Wonder what make these trucks so different?