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High idle, pretty stumped


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So I narrowed my power surging down to a bad TPS. I put ran a graph in Torque Pro and ...


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Old 10-07-2017, 01:27 PM   #21 (permalink)
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So I narrowed my power surging down to a bad TPS. I put ran a graph in Torque Pro and found this issue.

https://i.imgur.com/hmsIlby.png

https://i.imgur.com/4tCLSWE.png


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1996 Dodge Ram 1500 5.2L

Plenum Plate fix with Fel-pro gaskets
NGK V-Power plugs
MSD 8mm Wires
MSD Blaster Coil 8228
Accel Cap and Rotor

After Market Tow Mirrors (Don't care for the flip up but I'm happy they don't try to show me my own reflection)
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Old 10-07-2017, 03:08 PM   #22 (permalink)
 
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Got a break in the rain, so I went out to see what I could screw u...I mean, sort out.

Plugged in my scanner and went for a brief drive to see if I could catch the problem. I noted the TPS reading while sitting in Park and idling and went for a drive. Sure enough, the engine idled up so I shifted into park and noticed that the TPS was reading much higher than before. I gave the engine some throttle and noticed that the TPS was not responding right away so I revved the engine some. The TPS did eventually respond and the idle did settle back down, along with the TPS reading. Heading back and putting the truck in Park, I noticed that the TPS was not holding a steady reading like it should have.

Luckily, I still have my old TPS, which isn't bad (I only replaced it earlier this year as preventative maintenance) so I'm gonna swap it in and see what happens. If the issue is resolved, this will be the first time that I've had an issue with a Borg Warner part. And that's a little disturbing since half of the electronics that I've replaced are Borg Warner...


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1999 Dodge Ram 1500 4x4 SLT Laramie
The only true screw-up is one that can't be reversed!
American Racing Nitro, K&N open element, modified 50mm, eBay shorties, 2.25" y-pipe, Magnaflow cat, Cherry Bomb Extreme, DUI LiveWires/cap/rotor, canned 91 tune by Flyin' Ryan, Hughes plenum repair, 4x4 Posi-Lok, on-board Money Sink 3000
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Old 10-08-2017, 01:10 PM   #23 (permalink)
 
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Think I might be getting somewhere now. Swapped the old TPS in, ran the engine and it definitely reads smoother than the BW. Went for a drive, problem hasn't surfaced yet. Gonna drive for a few days and see what happens.


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1999 Dodge Ram 1500 4x4 SLT Laramie
The only true screw-up is one that can't be reversed!
American Racing Nitro, K&N open element, modified 50mm, eBay shorties, 2.25" y-pipe, Magnaflow cat, Cherry Bomb Extreme, DUI LiveWires/cap/rotor, canned 91 tune by Flyin' Ryan, Hughes plenum repair, 4x4 Posi-Lok, on-board Money Sink 3000
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Old 10-08-2017, 02:33 PM   #24 (permalink)
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Yep. I think I threw away my OEM Holley TPS by accident. I'm stuck with a Oriley's BWD part. I'll probably order a different part off Amazon and hope for the best tomorrow. I can say that Standard Motor Products is out of the question.

We distribute through traditional and non-traditional channels under our own brand names, such as Standard®, BWD®, TechSmart®, Intermotor®, Hayden®, ACI®, Four Seasons®, and through private labels.
I think I recall that this company also makes Duralast parts too.

Seems my only two options are Delphi and OEM. Mopar doesn't offer anything for a 96 anymore.


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1996 Dodge Ram 1500 5.2L

Plenum Plate fix with Fel-pro gaskets
NGK V-Power plugs
MSD 8mm Wires
MSD Blaster Coil 8228
Accel Cap and Rotor

After Market Tow Mirrors (Don't care for the flip up but I'm happy they don't try to show me my own reflection)
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Old 10-11-2017, 05:21 PM   #25 (permalink)
 
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Well, after a few days of driving, I can pretty safely say that a faulty replacement TPS was to blame for the idle problem. Haven't had any idle issues since I swapped the old one back on.

I do, however have a new little problem. It seems now that while cruising on the highway, if I hit a bump in the road, the engine briefly surges up about 200 RPM before returning to where it was. So, if I'm cruising 2,000 RPM and hit hit a bump, the RPM will jump to 2,200 RPM and then settle back to 2,000. Possible fault in my old TPS? I will say that the old TPS seems a little loose and if you tap on it, you can actually hear and feel something vibrating. Genuine OEM TPS is gonna set me back a hundred bucks though. Kind of a lot to spend on a guess but then, I'm pretty sure the TPS shouldn't "jingle" when you tap on it, LOL.


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1999 Dodge Ram 1500 4x4 SLT Laramie
The only true screw-up is one that can't be reversed!
American Racing Nitro, K&N open element, modified 50mm, eBay shorties, 2.25" y-pipe, Magnaflow cat, Cherry Bomb Extreme, DUI LiveWires/cap/rotor, canned 91 tune by Flyin' Ryan, Hughes plenum repair, 4x4 Posi-Lok, on-board Money Sink 3000
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Old 10-13-2017, 12:39 AM   #26 (permalink)
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Originally Posted by Yeret View Post
Well, after a few days of driving, I can pretty safely say that a faulty replacement TPS was to blame for the idle problem. Haven't had any idle issues since I swapped the old one back on.

I do, however have a new little problem. It seems now that while cruising on the highway, if I hit a bump in the road, the engine briefly surges up about 200 RPM before returning to where it was. So, if I'm cruising 2,000 RPM and hit hit a bump, the RPM will jump to 2,200 RPM and then settle back to 2,000. Possible fault in my old TPS? I will say that the old TPS seems a little loose and if you tap on it, you can actually hear and feel something vibrating. Genuine OEM TPS is gonna set me back a hundred bucks though. Kind of a lot to spend on a guess but then, I'm pretty sure the TPS shouldn't "jingle" when you tap on it, LOL.
I think it's safe to assume that it shouldn't rattle like that. I've also noticed that same thing with my truck when I hit a bump. I work right off I-35 and right before I get to my turn into work I have to drive over some "bumps" on the service road and every time the truck bumps a little the rpms go up like the TC is unlocking for a moment before locking back. Mine also does this going down the highway. I'm going to order a replacement this weekend if i can budget it in. If not then I'll just have to tough it out for another week. Mine also does this weird loping as it drives. This is what caused me to pull the sensor like I did. I was actually able to pin it to the loping of the truck. Loping/Engine surge.

Edit: I forgot that I found my old Holley TPS in the glove box.

Edit 2: Mine doesn't rattle so I suspect mine just has crispy electrical internals. Once it gets hot in the engine bay this thing just freaks out.

https://imgur.com/a/4obtU

They probably used the crappiest internals they could get their hands on.


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1996 Dodge Ram 1500 5.2L

Plenum Plate fix with Fel-pro gaskets
NGK V-Power plugs
MSD 8mm Wires
MSD Blaster Coil 8228
Accel Cap and Rotor

After Market Tow Mirrors (Don't care for the flip up but I'm happy they don't try to show me my own reflection)

Last edited by Shadow_Death; 10-13-2017 at 08:29 AM.
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Old 10-19-2017, 10:27 AM   #27 (permalink)
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So a few days ago I threw my reader back on the truck with the old TPS made by Holley and saw this... https://imgur.com/a/vQY2f

So now I guess I'll be looking for a replacement that isn't crap.


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1996 Dodge Ram 1500 5.2L

Plenum Plate fix with Fel-pro gaskets
NGK V-Power plugs
MSD 8mm Wires
MSD Blaster Coil 8228
Accel Cap and Rotor

After Market Tow Mirrors (Don't care for the flip up but I'm happy they don't try to show me my own reflection)
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Old 10-19-2017, 07:04 PM   #28 (permalink)
 
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I ordered an OEM TPS yesterday, should be here by Tuesday. We'll see if that does anything for me.


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1999 Dodge Ram 1500 4x4 SLT Laramie
The only true screw-up is one that can't be reversed!
American Racing Nitro, K&N open element, modified 50mm, eBay shorties, 2.25" y-pipe, Magnaflow cat, Cherry Bomb Extreme, DUI LiveWires/cap/rotor, canned 91 tune by Flyin' Ryan, Hughes plenum repair, 4x4 Posi-Lok, on-board Money Sink 3000
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Old Yesterday, 08:31 AM   #29 (permalink)
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I found out that AutoZone uses Wells products now for their electronics. I cross-referenced the part number and it's literally a Wells TPS in a Duralast box. Went ahead and bought it. Instantly all my issues are gone except for that TC issue. So I did some digging and it seems there is a 5v wire in the transmission that handles the lock and unlock of the TC on these 46re. Some have reported it running through the insulation and shorting out on the side of the valve body and causing TC to unlock and lock back. I think if time and my budget allowes I'm going to drop the trans pan and change the filter this weekend. While I'm doing that I'll check on that wire.

Figured I would post these notes here. It does make sense as a short to ground wire as it only seems to happen when we hit bumps.
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