3S-GTE USDM Turbo Engine Motor installed... Couple Questions

JeezyMister2 · 10-13-2009, 07:49 PM

Hey guys, well I finally reinstalled my motor. Weird stuff, though. When I have the AFM plugged in it won't crank over unless I give it some throttle. When I unplug it, It starts, and runs roughly.

All my vacuum lines appear to be good. But, I don't have a downpipe installed at all because it's at the welders getting a kink put in it. Do I have those two sensors just dangling. Is there any vacuum leak tester tools other than a boost guage?

Anyways , compression is 182 across.

Modifications are as follows: Bored .20 over wiseco pistons, machined head, Presicion sc61 t3t4, Wastegate ( with no hoses on the wastegate fittings ) Everything else appears to be firm , no open vacuum ports )

Could the downpipe have anything to do with it? I have no crossmember on with no back mount. Also, I'm sure my system hasn't been fully primed. What do you guys think? Any opinions are appreciated!

Joey.

Bak@EMSPowered · 10-13-2009, 08:02 PM

* Check for boost leaks
* Check the hose between the AFM and the turbo
* Check your mechanical timing (cam/timing belt)
* Check to see if adjusting your distributor (ignition timing) changes anything)
* Check again for boost leaks
* Do you have all the sensors hooked up? O2 sensor, afm, TPS, etc...?

JeezyMister2 · 10-13-2009, 08:54 PM

Well, I don't have a downpipe, I'm assuming that would create a boost leak. My mechanical timing is fine. The distributor was lined up perfectly when I installed it, but I will check, Do I just adjust the two bolts securing it? All the sensors are plugged in, but the o2 sensors that are attached to the downpipe are just dangling because I don't have a downpipe installed.

10-13-2009, 07:49 PM	#1 (permalink)
JeezyMister2 Certified G Join Date: Jan 2009 Location: Gulfport, MS Posts: 329 Thanks: 11 Thanked 1 Time in 1 Post My Google Map iTrader Rating: (4/100% )	Motor installed... Couple Questions Hey guys, well I finally reinstalled my motor. Weird stuff, though. When I have the AFM plugged in it won't crank over unless I give it some throttle. When I unplug it, It starts, and runs roughly. All my vacuum lines appear to be good. But, I don't have a downpipe installed at all because it's at the welders getting a kink put in it. Do I have those two sensors just dangling. Is there any vacuum leak tester tools other than a boost guage? Anyways , compression is 182 across. Modifications are as follows: Bored .20 over wiseco pistons, machined head, Presicion sc61 t3t4, Wastegate ( with no hoses on the wastegate fittings ) Everything else appears to be firm , no open vacuum ports ) Could the downpipe have anything to do with it? I have no crossmember on with no back mount. Also, I'm sure my system hasn't been fully primed. What do you guys think? Any opinions are appreciated! Joey.

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10-13-2009, 08:02 PM	#2 (permalink)
Bak@EMSPowered Banned Seller Join Date: Oct 2005 Location: Austin, TX Posts: 5,925 Thanks: 30 Thanked 193 Times in 165 Posts My Google Map iTrader Rating: (49/93% )	* Check for boost leaks * Check the hose between the AFM and the turbo * Check your mechanical timing (cam/timing belt) * Check to see if adjusting your distributor (ignition timing) changes anything) * Check again for boost leaks * Do you have all the sensors hooked up? O2 sensor, afm, TPS, etc...?

10-13-2009, 08:54 PM	#3 (permalink)
JeezyMister2 Certified G Join Date: Jan 2009 Location: Gulfport, MS Posts: 329 Thanks: 11 Thanked 1 Time in 1 Post My Google Map iTrader Rating: (4/100% )	Well, I don't have a downpipe, I'm assuming that would create a boost leak. My mechanical timing is fine. The distributor was lined up perfectly when I installed it, but I will check, Do I just adjust the two bolts securing it? All the sensors are plugged in, but the o2 sensors that are attached to the downpipe are just dangling because I don't have a downpipe installed.