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help with faulty code p1104

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kbolaloco1

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Hello all

I just bought a 2004 rxp in exelent conditions, two days ago I took it to a local dealearship to get it maintanance, and have the supercharger rebuild as it already had 130 hr on it, the guy at the shop told me that I had a 185 hp sc that if I wanted he would upgrade it to the 215 at not additional charge, and of course I agreed on, well long story short after everything was put back together when he attempted to reset the ecm to the new supercharger configurations he noticed that the tcm was not meassuring the throttle opening, and after trying with a d7fferent one we decided to go and change it, well everything looked good but now my checking engine came back showing p1104 and I read that it has to do with the tcm once again, the guy at the shop told me to ride it like that and if I see any sort of problem to take it back for him to check the cables, now my question is , how bad could this faulty code harm the engine, or is something that it wouldnt really make a difference or maybe there is a fix for it,, also I was wondering if this has ahything to do with the sc upgrade or not, any help will be really appreciated thanks
 
Problem number 1: your "mechanic" suggests to upgrade your sc to a 215 model which runs higher boost because it is intercooled thus reducing the risk of detonation and damaging an engine. Your 185 doesn't have an intercooler. See the issue here?

Problem 2: a fault code regarding your TPS comes up and he tells you to ride it like that? While I've never seen a faulty TPS sensor cause major damage to an engine, in theory it's possible for the computer to do something completely stupid based on false readings and cause engine failure.

Solution to both problems: Find new mechanic ASAP


Sorry if I sound harsh but I'm just amazed at the advice this guy is giving you.
 
KK40384 said:
Problem number 1: your "mechanic" suggests to upgrade your sc to a 215 model which runs higher boost because it is intercooled thus reducing the risk of detonation and damaging an engine. Your 185 doesn't have an intercooler. See the issue here?

Problem 2: a fault code regarding your TPS comes up and he tells you to ride it like that? While I've never seen a faulty TPS sensor cause major damage to an engine, in theory it's possible for the computer to do something completely stupid based on false readings and cause engine failure.

Solution to both problems: Find new mechanic ASAP


Sorry if I sound harsh but I'm just amazed at the advice this guy is giving you.
Click to expand...

Hey thanks for the input I really appreciate your opinion one more question, and please pardon my ignorance, all he did was replace some of my stock super charger parts for the 215 like the impeller, but the housing and everything else were just rebuild, he did mention that I would get more compression therefore he removed the exhaust restriction so there would be more flow going through, and that I needed to configured the ecu for the fuel injectors, would this be an issue still,? Also my ecu was bad and he put one of his own at no cost to me because the checking engine would light on, but I didnt have it on when I took it, I did have some kind of hesitation when flowing the ski right after cranking it up, and I had the word sensor displaying and my vts was shut down, so he did say that it was probably a rusted cable but that he would need more time to figured it out, he just said to ride it to see how it feels and if anything just bring it back to him, now p1104 says that a tcm adaptation cancelled, what does that means?
 
Sounds to me like he put a 215 ECU in place of your factory ECU that was bad. Unfortunately the two aren't compatible as far as the software is concerned. Did he also add 215 injectors? I'm not sure if they are different on the 185s. I have limited experience with the 185. I know they are different from the 215 to the 255/260 motors. There's a lot of unknowns in this mess and unfortunately your mechanic sounds quite clueless. Almost like a trial and error program.
 
Lol just my luck, the funny thing is that my ski has an intercooler so I really dont know if it was Ment to be like that and the previous owner put a 185 with a different ecu ??
 
It would be great if you could get all the items in the same page. Either mechanically or via updated software.

But,,, I think you have too many various items that really weren't designed to work with each other. Comparability may be impossible in this case

I question if your original ECU was defective. I'm guessing he did the mechanics and then found he had a software issue,,,
 
Ok how about this. Take a picture of the engine bay and intercooler so we can start making sense of it all. If its an aftermarket intercooler the 215 charger should be safe assuming you have the right injectors and ECU programming. It may not be as bad as it sounded at first.
 
Read the numbers on your ECU and post em up we'll tell you what you got. ie 66576xxxx etc.

My advice follow KKs advice ... get your parts back give him his back and get a new mechanic.
 
BMANN06 said:
Read the numbers on your ECU and post em up we'll tell you what you got. ie 66576xxxx etc.

My advice follow KKs advice ... get your parts back give him his back and get a new mechanic.
Click to expand...

I will post the number once i get home, yesterday i rode it and it actually worked pretty fine, i did not noticed much diffrence compared to the previous one as I was hitting 67 mph, I think that the mechanic just wanted to earn points on his ways making it sound like if he was doing much while he didnt changed anything, by the way this guy bakcup his work for up to six months, as far as programing i know my ecu was bad as he showed me in BUDDS how the throttle opening was not changing everytime he played with the gas, in reference to the check engine i noticed that sometimes is on and after riding it and cranking the engine again it goes off, and stays like that, until you turn it off again, any clues. I was trying to locate the intercooler and I dont know where is at, maybe you guys could guide me there, but the ski says IC intercolled so i guess it does have an intercooler??
 
I know you are saying your MPEM was bad, But,,,, aren't you having a TPS code now which is what the old MPEM was also referring to?

You may have a bad TPS sensor or bad wire.
 
04 RXP has always been 215hp. you're mechanic should have said he's updating your sc, not upgrading it from a 185hp. The updated sc changes include metal washers, larger diam shaft, etc., that's all he means. Your ECU and everything else (including having an IC that is located inside your intake manifold big black plastic box) is 215hp, same as all the other 215s out there. In fact, 04 had some better parts like your 629 cam, but also had some suspect parts like your valves.

MPEMs don't do much of anything on the early 4tecs, they are only a fuse distribution center. The ECU controls everything with regards to running but relies on a series of sensors to get info from and I doubt that your ECU is bad or that he changed it because they are very expensive and not something he would just give you unless just for testing. It sounds like he changed your TPS which is still not working right.

Some of the busiest techs are some the worst, they just talk a good game and are like salesman so you shouldn't judge quality on quantity.
 
ski-d00 said:
04 RXP has always been 215hp. you're mechanic should have said he's updating your sc, not upgrading it from a 185hp. The updated sc changes include metal washers, larger diam shaft, etc., that's all he means. Your ECU and everything else (including having an IC that is located inside your intake manifold big black plastic box) is 215hp, same as all the other 215s out there. In fact, 04 had some better parts like your 629 cam, but also had some suspect parts like your valves.

MPEMs don't do much of anything on the early 4tecs, they are only a fuse distribution center. The ECU controls everything with regards to running but relies on a series of sensors to get info from and I doubt that your ECU is bad or that he changed it because they are very expensive and not something he would just give you unless just for testing. It sounds like he changed your TPS which is still not working right.

Some of the busiest techs are some the worst, they just talk a good game and are like salesman so you shouldn't judge quality on quantity.
Click to expand...


What he said
 
thanks all for your input i really appreciate your opinion, when he was reading the diagnose in BUdds he was getting the the tps fault reading 8.6, even when he flowed the gas he will still see the same figure, he then tried with another throttle body assembly including new tps and will still show the same error after reseting the ski, then he tried another ecu and then it will see of much the throttle was opening and closing, so we assumed it was the ecu, but after running the ski for a couple of minutes, the check engine light came on after turning the ski on again, and like i said before it comes and go it doesnt show it all the times,thats why he decided to give to me for free, as he didnt "technicaly fixed the issue" as far as speed its that what im supposed to be hitting, 60-69MPH ?
 
speed on your gauge means very little but you should see around 69-70 depending on your weight and water conditions. what really matters is max rpm at that speed. what RPM are you seeing?

It sounds like an intermittent connection, check all your connectors and pins for corrosion and proper seating on the ECU, MPEM, and throttle body, fuse holders as well.
 
ski-d00 said:
speed on your gauge means very little but you should see around 69-70 depending on your weight and water conditions. what really matters is max rpm at that speed. what RPM are you seeing?

It sounds like an intermittent connection, check all your connectors and pins for corrosion and proper seating on the ECU, MPEM, and throttle body, fuse holders as well.
Click to expand...

thanks im actually seing rpms over 7500 since he opened it up
 
I agree with a bad connection somewhere. 7500rpm at wide open throttle seems a bit low to me. My 08 turns 8150 to 8200 even on hot days
 
The fact that you are getting a TPS code with both MPEMs I would look close at thenTPS circuit.

Before you go nuts though, I would remove and inspect all ground cables VERY well as a bad ground can haunt you forever. Then get the schematic for the TPS and check resistance on the various wires. If the resistance is all good, then I would check connection at those wires. I have seen pins pull out an 1/8 of an inch and cause intermittent issues much like you are having.

Take a look at the bottom (underside) of your fuse block. They are know to rust a bit and then the connection issue arises.
 
kbolaloco1 said:
any idea what cable could be ?
Click to expand...

If you're referring to the low rpm, it could be a few things. First it could be a throttle cable that's mis adjusted and isn't opening the throttle plate all the way at "wot". Another could be some sort of restriction in the intake or exhaust. Bad gas could also cause detonation and the computer pulls timing thus making less power and not being able to spin the impeller as fast as it should. I'm sure there's others too but that's just what comes off the top of my head.


Oh and I'm assuming you're running a stock impeller. If you're running an aftermarket impeller with a different pitch please let us know the specs.
 
Thanks guys sorry I took kind of long to reply was kind of busy at work, well today I rode it again the ski was low in gas amd the long beep came out display thd low gas warning, I went and bought like 6 gallons of 91 octane gas and threw it on the lake, for the first minutes it ran weird as it would only hit 6500 rpm, then I brought it to shore to make sure everything was fine and didn't see anything weird, cranked it up and everything was normal again the ski was back to normal, so I don't know if it was in low fuel restriction or not, again the ski will go as much as 7900 rpm but never went over 8k another thing I noticed was when the ski hits wot sometimes It hesitates for less than a second, then it pulls back again, tomorrow I will check for the grounds but if could get a heads up on where to find them will be great, thanks
 
sounds like you have a spark plug that is fouled. the 4tecs do exactly what you describe, they work intermittently for awhile with decreased rpm but they run suprisingly well on 2 cyl.
 
thanks for that info, but i had just finish doing an oil and spark plugs change, could it be something else, how would i know if i have a faulty spark, any way to test it, I also checked for all the connectors and everything looks normal the negative port of the battery, was midly rusted and i cleaned it, as far as the grounds still couldnt figured out where they r located, i checked the supercharger while in the proccess and i was able to move the impeller just a bit but it took a lot of effort, i will say that i was moving it along with the engine, as it would only turn half of the spin, i mean maybe im being too otc and the ski runs perfectly fine, as per others have told me but anyways im just afraid of staying strange when i go out to ride it. thanks for all your help guys
 
Plugs are cheap so if it really bothers you that much throw another set in and see if that makes you happy. If not you're out $12 and we can look further into it. Most of the time something like this happens its almost always plugs or bad gas.
 
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