2G P1104 wastegate soleniod fault

[6BoltMirage89]

Hey guys , just recently purchased a 1997 gsx automatic , the stock t25 on the car was shot ...so I switched it with a stock 13g turbo from my 6 bolt in my other car along with the stock 1g manifold. After swapping turbos car was throwing all kinds of codes including MAF, air intake temp, manifold barometric pressure , and this p1104 -wastegate soleniod circuit fault . fixed a bunch a vacuum leaks I had and got a new MAF ... now the only remaining code is the p1104 and the car builds absolutely no boost .... so it seems the wastegate is stuck open ... I also hear a strange loud click from the car that sounds like wastegate is stuck or something (sorry for the terrible explanation) . I have done almost all the maintenence to the car besides a new timing belt ..which is on its way. I am going to check the soleniod connection Tee again and try to some pictures ..unfortunately it's pouring out in NY right now ... Thank you all at dsm tuners ... I have found and read a great amount of information from this forum !!

also with the previous t25 , car had seroius boost leaks but still built up to 10-14 lbs... and now with the new turbo I can't even build 1 lb, which the new 13g did build a few lbs when it was first swapped and throwing all the codes... now that I have it down to the single p1104 code, it stopped building boost

 

[jstory352]

The 13g is known good? I would try a different waste gate actuator. Also check the linkage on the waste gate flapper, mine sheared the clip one time and the arm vibrated off, not what you want to find out when you're trying to gain speed to merge on an on ramp. Hope this helps.

 

[jstory352]

Also make sure the waste gate preload is set correctly. If it's just slipped on the linkage then pressure will force it open before you start building boost.

 

[6BoltMirage89]

The 13g is known good. I would try a different waste gate actuator. Also check the linkage on the waste gate flapper, mine sheared the clip one time and the arm vibrated off, not what you want to find out when you're trying to gain speed to merge on an on ramp. Hope this helps.

yea Def would not be fun , the Waste gate actuator is the piece that sits right beneath the compressor housing right ? that has the linkage connected to the manifold ?

 

[jstory352]

It's connected to the turbine housing but yes. If you can compress the rod into it and keep your finger tip over the nipple you should feel the air pressure against it. An easy check, easier to do when it's removed. It sounds more like the linkage isn't set cause when my diaphragm blew on my old one it would never stop building boost.

 

[6BoltMirage89]

It's connected to the turbine housing but yes. If you can compress the rod into it and keep your finger tip over the nipple you should feel the air pressure against it. An easy check, easier to do when it's removed. It sounds more like the linkage isn't set cause when my diaphragm blew on my old one it would never stop building boost.

yea i will try it today hopefully and get back to you , Thank you so much for the help and such a prompt response ! I will update as soon as i can

 

[pauleyman]

The code isn't for the wastegate actuator it's for the solenoid. On a 2G you have to leave the soenoid plugged in even if there are no vacuum lines connected to it. And on the maf issue since you got all 3 codes what probably happened was the car was ran without the maf plugged in and your original maf may still be good. It's very common to get all 3 codes in that situation.

 

[6BoltMirage89]

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

so these are some pics of the soleniod , actuator , maf and vacuum lines ... there are vacuum lines from the manifold going to the soleniod and the electrical connection is in , haven't checked the linkage just yet since my schedule or weather is not cooperating .. Hope this helps you ..help me

The code isn't for the wastegate actuator it's for the solenoid. On a 2G you have to leave the soenoid plugged in even if there are no vacuum lines connected to it. And on the maf issue since you got all 3 codes what probably happened was the car was ran without the maf plugged in and your original maf may still be good. It's very common to get all 3 codes in that situation.

yea i realized that after I had already swapped MAFS , I uploaded a pic of the solenoid connection and checked the lines from the Tee to the manifold they are hooked up, does this mean I need a new soleniod connection plug ?

also forgot to mention , car had greddy BOV and K&N intake ... I have an apexi Afc that I will be wiring upto the car next week

 

[jstory352]

I'm not 100% with these cars yet as I am still learning but don't those vacuum lines run to the fuel pressure regulator? The waste gate solenoid on my car was mounted to the passenger side inner fender. I would check there also, looks the exact same and for all I know could be. Maybe someone with more knowledge could chime in and give further guidance. Also just curious how the oil is drained from that turbo, isn't the oil feed supposed to be clocked @12 O clock? Glad to see it stopped raining on you so you can get out and work on your car.

 

[6BoltMirage89]

I'm not 100% with these cars yet as I am still learning but don't those vacuum lines run to the fuel pressure regulator? The waste gate solenoid on my car was mounted to the passenger side inner fender. I would check there also, looks the exact same and for all I know could be. Maybe someone with more knowledge could chime in and give further guidance. Also just curious how the oil is drained from that turbo, isn't the oil feed supposed to be clocked @12 O clock? Glad to see it stopped raining on you so you can get out and work on your car.

yes the turbo is usually fed from that position but since I had nothing to block off the filter feed I just blocked the other two ports on the turbo and fed it thru there . I'm not sure on the fuel pressure regulator lines . I'm having a local dsm buddy take a look for me today . The linkage and wastegate actuator is good and lines up correctly closed ... I'm hoping I just hooked up some vacuum lines incorrectly

edit: so since my dum ass fed the oil thru the coolant line as shown ... bearings have probably siezed and that's prob why I'm not boosting ... because the turbo is now shot ..due to my retarded mistake ...checked today, has a lot of play.... gonna swap another 13g I have on ...ugh I feel like such a moron

 

[jstory352]

Don't be so hard on yourself bro, we all make mistakes at some point, easiest thing to remember is put the oil in on top hopefully you have better luck from here and if you have concerns about anything going on just ask some of these guys.