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Discussion Starter #1 (Edited)
I tried to start up my Challenger this afternoon and it would not turn over. It just keeps cranking. I noticed the Electronic Throttle Control light and the Malfunction Indicator Light (MIL) were on. I checked my battery for voltage just in case I had a battery issue, but it was fully charged. Any ideas on how to troubleshoot this issue?

Thanks in advance!


***Update: Hello all. Just wanted to let you know that I took my Challenger to a dealership, and sure enough my fuel pump died. Thank you all for your comments. Most of you thought it was the fuel pump, and you were right. Thanks again!!!
 

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I'd try the tried and true disconnect the negative battery cable for a while, see if that let's you start it. If it ran I'd suggest having an auto parts store read the code set. The dealer may be the destination as they can use their Star tool to find the issue, could be PCM related, or a missing voltage. It can get pretty involved, but the code thrown is the 1st step. A Guy
 

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Thanks! I will try that and see what happens.
The various warning lights in the dash will illuminate when ignition is in Run but engine is not running. The time it takes the starter to start the engine is included, so you can't really go by if they are illuminated at KOEO. You have to wait for KOER to see if they remain illuminated.

Now that is a problem if the engine won't start obviously, so diagnosing is going to require other approaches here.

Let's start with the basics:
1) yr model and mileage of car?
2) any changes, maintnances, or mods recently performed? If so, what and how long ago?
3). What is the last thing that was touched in the powertrain? (e.g. Oil change, air filter, Catch Can, etc.). How long ago?
4) has the car ever done anything like before? If so, when and what was the procedure or part (if any) done to affect the fix?
 

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Discussion Starter #5
Hello, thanks for your reply. Here are the answers to your questions:

1. My car is a 2010 Challenger SE/V6 and has 96,000 miles on it

2 Car had an oil change 2 months ago and has no Mods.

3. Last thing touched was just an oil change 2 months ago.

4. The car has never done anything like this before.
 

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This is just a guess, but your fuel pump might have died.
 

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2nd for the fuel pump/sending unit being the culprit. That old of a yr model and the lack of anything else being done is a dead giveaway i think.

You can verify if you're interested and motivated enough by pulling the back seats to access the pump and sending unit wiring harnesses. Testing them for proper voltage and resistance should reveal a problem is present, if one is there.
 

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If you have an OBD scanner check for any codes and look them up in the online chilton manual.
https://www.challengertalk.com/forums/f489/chilton-repair-manual-access-666787/

Here is an explanation of what the ETC indicator means.

Quickest way to check fuel pump is to verify the injectors are getting pressurized fuel...~50psi. For this you will need a fuel pressure gauge.

Or you could just listen for the fuel pump when you turn the ignition to "on/run" but don't turn it over. If you don't hear the whirl from the backseat where the pump is then it is probably either the pump, relay, or fuse.
 

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Hey guys; i had a similar warning light and rather than start a whole new thread just though i'd piggyback off this one. I have a 2017 Dodge Challenger R/T, 6 speed manual, with about 6500 miles on it. I've done a few light mods, CAI, Throttle body port and polish, Thermostat, Oil Catch Can, Mid-Muffler Delete, and Dyno Tune at a trusted local tuning shop.

The car runs strong and sounds great! About 3 times over the last several months, i'll have the Orange "Service Electronic Throttle Control" dummy light pop up on my dash between the tack and the spedo guages. It flashes a few times and then goes away. Car runs fine; doesn't go into limp mode or anything. It doesn't stay on the screen it just flashes and dings and goes away.

Now i take great care of this car; and it's not a major issue YET; just annoying. What could be causing this? How can I get rid of it for good? Thanks.
 

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if it's flashing when it illuminates (while engine running), that's supposed to be the more dire of the scenarios that could illuminate it. Evidently a solid light aint good, but a flashing one means "prepare to walk" or something more technical.

The fact that yours doesnt behave poorly or any differently seems to fly in the face of that distinction, but who knows.

I would have any and all DTCs pulled so that you have a list (assuming more than one) of codes you can start troubleshooting one by one. Some may be interrelated such that they are there simply because others were set, and those can be ignored right off the bat. Either way, it is hard to know where to start without more info, and the stored DTCs are about the best source of info to use in diagnosing something like this.

You could take it to a dealership, but my guess is they wont even touch it with the ported TB and non-stock tune in place. They will prob just say, "those things messed it up!" And send you packing. Could be right, could be wrong, unhelpful either way.

But they are masters at CYA if nothing else...
 

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Interesting. Will just keep an eye on it for now. Not causing any major problems so....

But still; low miles, all pretty common mods (usually in the top 5 "do first" mods listed on here) and otherwise VERY happy with the car.

Hoping the electronic gremlin situation doesn't mess it all up for me. As a follow up question; i wonder if i'd be better off taking it to the tuning shop to chase this down, or to the dealer?

Thanks
 

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Interesting. Will just keep an eye on it for now. Not causing any major problems so....

But still; low miles, all pretty common mods (usually in the top 5 "do first" mods listed on here) and otherwise VERY happy with the car.

Hoping the electronic gremlin situation doesn't mess it all up for me. As a follow up question; i wonder if i'd be better off taking it to the tuning shop to chase this down, or to the dealer?

Thanks
I think it couldn't hurt to take to the shop that did the tune to see if they have any other Dodge's with their custom tunes encounter same issue. If they have, great. They'll probably know exactly where to look or what to do to address it.

If they haven't, your guess is as good as mine as to whether or not they will be able to do anything about it.

I would say keep driving it and don't worry about it, but the little angel on my shoulder scolds me for that. There is a possibility this is something serious and it will leave you stranded sometime in the near future. There is also the possibillity it is nothing more than a loose wiring harness plug on the TB. I don't know, but I would hate to hear you broke down and were left stranded because nothing was done about a warning light.

It's your car, I won't tell you how to proceed. I will say if it were me, I would want to know why the light is coming on intermittently. But that is only because I've had to leave my car in another town for a week while I tried to arrange a tow to the dealership to figure out the problem, all after I ignored a warning light (battery problem indicator) that was coming on periodically for a few months.

If you decide to try to find the culprit for the light, you should prepare for the possibility that you have to return everything to stock (or as closely to stock as possible) to get it done. If you have to take it to the dealership, that is certainly the best way to go - they will not want to work on it with the modified tune and TB (and they may even be prohibited by company edict from doing so without a signed release or something absolving them from blame should something else go wrong).

At the very least, you may have to have the tuning place restore your stock tune, and then find a stock TB to put back on before taking it to the dealership, assuming you end up doing that. Replacing the CAI with the stock airbox would also be preferable, but they probably wouldn't throw a fit about it as quickly as the TB and custom tune.

But still, before all of that, you can take it by the local Autozone or Oreilly (or Advance Auto, NAPA, etc.) and have them plug in an ODBII scanner to pull any/all DTCs. If none are stored, you can probably rest more easily that it is not about to die on you and need a tow. But if they pull up a half-dozen codes which indicate something is seriously awry (at least from the PCM's viewpoint), then you will know it is time to start making a plan on how to proceed.
 

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Hey guys; i had a similar warning light and rather than start a whole new thread just though i'd piggyback off this one. I have a 2017 Dodge Challenger R/T, 6 speed manual, with about 6500 miles on it. I've done a few light mods, CAI, Throttle body port and polish, Thermostat, Oil Catch Can, Mid-Muffler Delete, and Dyno Tune at a trusted local tuning shop.

The car runs strong and sounds great! About 3 times over the last several months, i'll have the Orange "Service Electronic Throttle Control" dummy light pop up on my dash between the tack and the spedo guages. It flashes a few times and then goes away. Car runs fine; doesn't go into limp mode or anything. It doesn't stay on the screen it just flashes and dings and goes away.

Now i take great care of this car; and it's not a major issue YET; just annoying. What could be causing this? How can I get rid of it for good? Thanks.
When you installed the ported/polish throttle body did you perform a throttle body learn? Did it generate a DTC, if so did you read it with a scan tool? Could be TPS and ETC motor signals are off a little. Even the service manual states a relearn should be performed when installing a throttle body. I think on the earlier years the learn sequence could have been done without an OBD tool but I believe on the newer years you need a scan tool with this capability. I know HP tuners has this capability through VCM scanner but I don't think diablo sport does.

976445
 

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Yeah i will probably just play it by ear for now; and take it to the tuning shop at the end of the season before storing unless the warning pops up more frequently. I've probably spent 3-4k on these various mods; which i'm otherwise very happy with; so returning to stock is an absolute last resort. In fact i'd go a long way to get this figured out before doing that.

The throttle body is the factory unit; just ported/polished by Dan "The Fastman" Arcand. Valid point though and worth thinking about. The tuning shop here locally that did the work is very reputable; has done some incredible builds, so keeping my fingers crossed they will be able to ferret out and correct this problem/glitch. Thanks for your input everyone and i'll post an update down the road. Loving the car otherwise; electrical stuff just irks me because it can be elusive to fix and thus annoying.
 

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Just to be clear, I do not think the ported throttle body has somehow screwed something up and caused this. I'm just speculating that if you take it to the dealership and ask them to diagnose the light, they are likely to behave like your internet service provider when you are running your own cable modem (instead renting theirs) and you call to complain about slow internet speeds - their default response without even looking into it will be "Customer Provided Equipment! It's the customer provided equipment that has fouled everything up!!"

It's a cop-out for sure, and mostly just a way to get out of having to do any real work IMO. But they wouldn't be the first dealership who blamed non-OE equipment for a fault, and they won't be the last (if they were to do it).

Also, if it gets to the point that you do take it into a dealership, you might check local salvage yards (car-part.com) for a used stock TB and throw that on before taking it in. I'm not sure where you're located, but I did a qick search for prices around here, and I see some availble for $120 or less for that engine. That's not too bad IMO..worth keeping in mind.

Nuke

P.S. your tuner folks can confirm this, but that custom tune you bought is yours, forever. If you need to return the car to its stock tune, you won't necessarily lose the custom tune. You can save it and have it reloaded later once the dealership visit is over. If you had a hand-held tuner like one of the DiabloSport units, you could do the whole reload stock tune/load custom tune yourself even...but purchasing one of those ($400 or so IIRC) is an extra expense you may not want to take on obviously.
 

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From the shop today "Throttle Body has issue maintaining idle. Needs replacement."

Well that was a good investment (the port and polish). Failing after a few hundred miles..

Now the question is replace with OEM, or high quality third party unit that will allow more airflow. Any thoughts, recommendations?
 

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Bummer. Did you notice any improvement with the porting? If not, I'd get a OEM unit and call it a day. Not sure if just the electronics of the TB can be changed? It certainly isn't the physical ported part that is bad. Unless the butterfly is hanging up somehow

A Guy
 

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Why would it only have issues with idle? I would suspect the tune might need tweaking. If the voltage at which the PCM thinks the throttle is closed is still stock it could be seeing too much airflow and trying to adjust other parameters like injector pulse width or spark to maintain the desired idle.
 
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