Yet another starting problem, after 60k

[jthod]

Ok, I'm trying to write this without punching the key through the desk! I finally got my car back together after completing the top 60k. I even printed out the instrustion for the SHO Pheonix site, and followed them pretty closly. Anyway, I got everything put back to gether, push the car out of the garage. I attached the battery cable and waited 30 seconds. By this time I'm all excited because i finally get to drive it agian!! But no, it cranked over kinda funny, a little carbon smoke (expected after cleaning intake ports), and it went to ~2k rpm and died. So I waited a few second and tried agian, both time no foot on the gas. started up almost normally, went up to 3k rpms and stayed for 2-3 seconds and went all the way back down and died. It did this three time, almost all in the same fasion. I never gave it gas. It seemed like it was trying to set the idle, like normal after plugging the battery back in. after the last time I gave up, I couldn't take working on that thing for another minute, at least tonight.

-To me this sounds vaccum or fuel ralated, but I didn't remove any of the fuel lines or rails, and I triple checked the vacuum lines to both picture I had taken, and the manual.

I'm hoping i just missed a plug or hose, but any ideas?

Any help would be greatly appreciated!! Maybe thing will look different tomarrow.

 

[jthod]

:bump: PLEASE HALP!!! I've got to get this thing running!!!

 

[SASHO91]

Sounds like a BIG vacuum leak. You really need a second set of hands, that way someone can start the car while you look/listen around.

Did you pull the intake apart? Did you re-use the intake/head gaskets- were they in decent shape?

 

[hawkeye18]

it sounds like either you left the IAC unplugged (or it died), or a massive vacuum leak. Make sure all the intake bolts are torqued down properly. If you took it apart, make sure all the intake hoses are tight, and check the big vacuum line at the back left of the intake (I know, you said you checked). Have somebody else start the car and listen for a hissing noise when it starts. Vacuum leak hunting is, unfortunately, a 2 man job, especially when it won't stay running.

 

[jthod]

I did pull the intake apart and I had it powdercoated. ALL of the gaskets were replaced, and all of the gasket surfaces that were powdercoated were RTV'd with the copper type. I just tried again and gave it gas this time, and it would keep running if i gave it gas, which leads me to believe the IAC. I know it was put together correctly, and all of the vaccum tubes are in good shape and attached correctly. My only concern with that is that i may have cracked or pulled the wiring from the plug going into the IAC. I'm going to check all of the wires and see what if anything I can find.

 

[hawkeye18]

Well, the easiest way is to unplug the IAC and see if it runs any differently. You're looking for that wire to come from the same connector that all the fuel injectors come from, so it's probably not that connector. Check pin 21 of the PCM, and check the IAC connector to make sure it's not messed up. A simple resistance check will tell you if you have an open. Also, check the ground wire (the red one) for an open to... well, any ground. The power wire is black/orange.

If you get nowhere with that, get some starter fluid while running the engine (with partial throttle) and spray it everywhere to see if the RPMs jump up any. If you get the starter fluid into the leak, the mixture will suddenly go from very lean to very rich.

 

[jthod]

I re-torqued everything accessable on the intake, retighted all of the intake couplers, and all of the hoses. I obviously have a vacuum leak near cyl 3 and 4 on the intake. The secondaries do open , so thats ruled out. It's hard to tell if it is the couplers or the gaskets on the intake, so, , I will be taking the intake back apart and checking the gaskets, and re-torquing everything.
It does seem to be staying running better, will go up to ~2k rpm, and die. It also takes less pedal to keep it running.

My question is what to do about RTV, redo everything lightly?

And to anyone that has had vacuum leaks, but a good IAC, does the motor dies in this way?

Where, other than special order, can you get or make the intake couplers?

Thanks A Lot for all the help!!

 

[jthod]

Well, I took everything apart this afternoon. I checked all of the area I RTV'd and put more on where it looked like it needed it. I re-torqued all of the nuts on the secondaries and the runners to the tanks, tightened the main bolts in the center, reconnected everything, and took a break to help my dad with the five deer we have waiting to be processed on the workbench I am occupying in the garage garage.

Came back out to start it and guess what, NO START!!!!

I have not checked for spark yet, but I suspect that to be the problem. I just don't know what I did to my SHO to make it treat me this way:cry: The only electrical things I disconnected were the obvious, DIS, TPS, Idle speed control valve and MAF. Nothing out of the ordinary, just regular disconnect and connect.

I'm going to get a spark tester tomarrow and see what I get.

Anything in particular that I should check other than that?

If I don't get this thing running soon I'm going to shoot another deer!!.....or two

 

[93nighthawk]

Did you try to run a KOEO? Might lead you into the right direction?

Another issue might be that the DIS Module is not grounding properly on your freshly powdercoated intake.

And you did not mention if you reconected the Camshaft Position Sensor.

 

[jthod]

Did you try to run a KOEO? Might lead you into the right direction?

Another issue might be that the DIS Module is not grounding properly on your freshly powdercoated intake.

And you did not mention if you reconected the Camshaft Position Sensor.

I'm going to check all of the grounds on the crossover tube tomarrow. I was going to run codes tonight but I didn't have the patience after it not starting, needless to say I was ******.

The surface that the DIS mounts to was masked completly, but the but mounting holes on the inside of each end of the crossover tube were not, which may be causingit, but I had the thing stared last night, and I haven't done any thing different there.

I didn't disconnect the CPS, so that's not it, but I will check the connections and plugs to see if anything got pinched or crushed.

I'm GOING to get this stubborn old dog running tomarrow!

 

[jthod]

It's Alive!!

It was reborn at 9:21 this morning. The ground at the crossover tube support was the culprit, all it took was a little Dremel work, and BAM, it started right up. :woohoo: Runs like a top, much smoother and quieter.

:thankyou: Everyone for there help.

Can't wait to do the front 60k this summer!!!

 

[93nighthawk]

Congrats! :wave:

 

[M3rcury88]

Glad to hear you got it running.

 

[jthod]

is this old post day on the forum?!

 

[SHOGUN88]

Thats the same thing that happened to me, but I checked the ground first, so it wasnt really a hassle.