Help, needed tps tester in cache valley ut asap

[Sickbuild]

I have an issue with my sled going into det mode this yr.

Never had problem till now.

Left about a gallon of full in over the summer with stabilizer in it then fresh full to start off season. Stock pro with par13.6 head with two seasons on it with no prior probs. 400 miles total..stock clutching.. over fall I did this,

Changed clutching to mds
Then Indy Dan balanced and sheeve mod done
Then cleaned power valves.look all good just a little carbon

Then swapped exhaust pipe to a brand new 14 because mine had some minor rust and I'm o c d ish, and I had a brand new pipe.

Then last..but,the thing I screwed up was I notice my throttle cable adjuster under the rubber sleeve was loose/lock nut thing was spinning and the short of it is i screwed up my adjustment on cable then on the idle screw.

I took it in to check my det codes and presumably adjust my tps back to were it should be. Lessen learned. ..well
Went and picked up sled from dealer and notice sled now ran from 1600 rpm now to 1900-2000. I took it home, then the next morning drove it right back thinking something wasn't right and asked how they adjusted tps?. They told me it was right and my idle is just the way it is because the ecm??. Ok well, I understand it to be different. I asked/explained how I thought it was supposed to be done by making sure there is slack in cable, then back off idle screw till throttle plates close, then adjust/synce tps then adjust idle.
He in formed me you don't back off idle screw.
I explained it had to be backed off to "zero" out, close throttle plates.

Well I browsed the store and later he came up to me and said he was wrong but the mechanic will check it out again...he also said that mechanic could adjust tps within specs and drop my rpm back down some?.....ok?

Fast forward pick up sled , they dropped rpm to 1800 ish took it up today and runs fine till I load motor then det. Not as bad or sensitive as before but still det.
I am running 110-120 temps.
But if I keep on gas for 3 secs.....det

I've created many variables but still thinking...it's tps this time I noticed the mechanic got into my idle screw because my can was pulled off and tossed around on the floor.so anyway
I am trying to locate someone or way to check it myself since they won't be able to for a week plus...

I rode the 1996 440 z today and it just isn't the same.

Thanks for any help 801419425four. Logan ut.

 

[SRXSRULE]

what year sled? what are you using for fuel? what elevation are you riding at? It seems the pros with the heads on them become sensitive to DET issues and any small changes to the exhaust can cause issues. Just switching between different cans/pipes can cause or fix a DET problem. Eric

About the TPS issue, you can do all the testing at the ECU without having a special tester. Let me find my old post on it.


Here was my old post about check the tps setting.....

OK, so I had a little time today to check into this so I printed off the wiring diagram and did some testing.

The bag in front and above the primary clutch that has the test connectors in it, The one labeled ECM PWR. I wanted to double check what it has to it with the sled running before I put an external power to it. It has 13.94-14.0V DC at that connector with the sled idling. B+ side is Orange, GRND side is Brown.

So I hooked up a regular car battery that had measured 13.6 VDC, then checked for my 5 Volt signal at the ECM and on cavity #24 RED/WHT wire (back probe with connector plugged in to ecm) I had EXACTLY 5.00 VDC.

Next I checked the signal wire coming from the TPS at the ECM, cavity #7 AQUA and my idle setting measured .939 VDC.

Testing done ==== NO special tool needed. I did all my testing at the ECM because its easy to get at, and THATS what the ECM is actually seeing, you do the testing by unhooking the TPS connector and you may be covering up a bad connection or bad/faulty wiring. This INFO is for a 2012 Pro 800, other years may vary. Hope this helps. Eric

Page 4.43 of service manual. Idle Base setting .930-.950V DC My sled is set at .939 and works perfect, I don't have any starting issues, reverses issues or drivability problems. I was just testing mine for the fun of it

 

[Sickbuild]

Thanks...I'm running eth 91,with eth resistor.
8400 elevation
At first, I just thought I was over taching so I loaded my weights Heavy! But nope.

I have stock exhaust still on. It's just a 14 stock pipe with my 12 stock can.

Thanks for the help. I just might pull head, put all stock clutching back in then see what happens also. 12 pro 800 rmk 155. Thanks

 

[SRXSRULE]

Any way you can get some non-ethanol fuel or a couple gals of race gas to just test and see if it is a fuel issue? Eric

 

[Sickbuild]

Yes, I'll drain my fuel then put it new non eth with some av gas to see if that eliminates the det. If not then stock clutching will be put in (which I don't think is it but?)
One less variable.

 

[Johnny]

Any way you can get some non-ethanol fuel or a couple gals of race gas to just test and see if it is a fuel issue? Eric

+1
I was never able to go a day without a DET issue if I didn't use a couple gallons of race fuel. This was on a 13 with the 13.6 head, and always ran non-eth.

 

[Sickbuild]

I get what you're saying it's just that I've ran it a season and half down to 5000 elevation without det. At 4500 I hit det 2x . Either way I'm going to try better fuel

 

[SRXSRULE]

I get what you're saying it's just that I've ran it a season and half down to 5000 elevation without det. At 4500 I hit det 2x . Either way I'm going to try better fuel

you might be getting lesser quality fuel. Maybe using a different gas station or maybe the same station you have always used switched suppliers? pump gas quality varies a BUNCH. Eric

 

[xc6rider]

Since gas prices have been falling, my fuel mileage in my truck has dropped. I think our fuel has been getting a poor blend since prices have started dropping. (Imagine that huh). Any fuels blended with ethanol are more prone to inconsistency of blends. And, the same head may not work safely any longer without some av gas or other good octane source.

Try new premium with no eth like the guys have mentioned.

 

[Always war]

I have the same setup, and have to run 20% race gas or sled will det.

 

[Sickbuild]

fixed

So. I decided to take off hood and figure out everything.
I looked over everything and I noticed that on the TPS it was loose. The bolt had backed out a 16th of an inch and was causing the TPS sensor to vibrate on the head.

Tightened it up and ran in the field 4500 ft ele and no det anymore!
Thanks for the help guys. Now I can ride.