2G 6 bolt swap dying in 2G GSX

[TEEJ]

okay i'm starting a new thread because nobody replies on the 7 year old thread that i commented on so here goes. Did a 6 bolt swap on my 97 gsx with a 91 tsi awd engine. followed all of magnus and rre's instructions on it. i'm told by a buddy that it's a vac leak but i can't perform a test because the car will not run without someone constantly giving it gas. any ideas would be greatly appreciated.


the squealing in the video is the alternator belt. ignore it.
YouTube - 2G gsx won't run after 1G swap

 

[turbo98eclipse]

I think we need more info on what is all done to the car...ie: mods

 

[TEEJ]

it's all the in the profile. pretty much a stock 6 bolt rebuild. evoIII 16g turbo, fmic, greddy bov, egr blockoff.

 

[brian9397gsx]

How about sensors on your throttle? IAC maybe idle switch, is the tps adjusted correctly?

 

[TEEJ]

you think those sensors would cause it to not even stay running and idle shitty? i can start it as you can see in the video but i constantly have to give it gas to keep it running or it just dies.

 

[turbo98eclipse]

Everything he stated has to do with it idling properly.

Is the CEL or anything on? No boost leaks? Is the bov adjusted properly? Firing order good? Plugs good? Compression good in the engine?

 

[TEEJ]

yeah bov and compression are good. new plugs and wires are good. no boost leaks that i could tell. when we were able to drive it, it wouldn't rev above 5k rpms and it boosted 10 pounds. but no CEL which baffles me.

when i bought the 2g it ran but i sent a rod through the block like i did to 2 others. so i did a 6bolt swap and the guy i bought the engine from had the same problem with it in his 1g if that helps any.

 

[herms99gst]

Is the throttle linkage properly ajusted?

 

[TEEJ]

yep. i just need to get it to idle so i can see what's wrong with it. any suggestions as to why it won't idle when i let off the gas?

another odd tidbit. i was working on it the other day and it had a 2g throttlebody on it. i loosened it to replace a cap on a nipple and forgot to tighten it and started it up and the car ran at 1500rpms. i went to adjust the idle to lower it and that's when i had realized my mistake. i tightened it and then it wouldn't idle again. so i went ahead and replaced it with the 1g throttlebody i had bought. any insight?

 

[turbo98eclipse]

Is the biss screw in?

When you had the other motors in did they idle fine?

Sure your fuel setup is ok? Ie: no clogged filters or anything

And to answer your question a leaky IM gasket couldddd cause this but it would have to be a severely bad and big leak... if you said you did a boost leak test then that would have already come up in your results... so I'd suspect not

 

[Ryan4dc]

Another sensor that can cause this would be the coolant temp sensor. Did you try cleaning out the throttle body? I know for a fact that the biss screw o ring fails as well as the throttle body shaft seals. But that's for after the engine idles better. Good luck.

 

[TEEJ]

we threw in a 6bolt and it was running fine until the oil pump failed on me (i mistakenly bought a rock oil pump). the pulley got red hot and sheared off the stub shaft in the balance shaft eliminator kit and in turn the timing belt snapped. i took off the head and took it to the machine shop to get it fixed again. after we got it back the only thing that had changed from the point of it running fine was the intake manifold gasket that i put on. the biss screw was in until the loose throttlebody incident. i haven't played with it since. so you all think i should replace the IAC, reset the TPS, and replace the CTS?

 

[Ryan4dc]

Well, the cts can be checked if working properly with a volt meter. The tps can also be checked same way. How is your timing? The isc, didn't research that yet on testing.

 

[TEEJ]

all timing marks are spot on. haven't been able to play with the CAS yet because of the cars inability to have any idle whatsoever after the timing belt failure.

i wonder if pistons may have been able to crack some valve guides when that oil pump incident happened and the machine shop just didn't catch it. i may have to look into that. i have a spare head laying around that i picked up for my build engine that i may just throw on there.

 

[Ryan4dc]

Did you check to see if the block was damaged from the oil pumpfailure? I'm sure it might have similar damage to oil starvation. I would start with compression if that was the case.

 

[TEEJ]

it was right after the rebuild. maybe 20minutes of idle time. then it sheared off. we crank it over and compression is good on all 4 cylinders. the block appeared to be fine after we pulled the oil pump off.

 

[Ryan4dc]

Rebuild? So you replaced the oil pump with the rebuild? Some people neglect to prime the oil pump prior to first engine startup. I'm sure that wasn't the reason your oil pump failed. Did you try to test for boost leaks? Maybe a large boost leak getting by the maf.

 

[TEEJ]

i don't have a maf. i have the stock mas setup still. we did a complete rebuild on the engine before we put it in. put grease in it to prime it and even cranked it a bit before startup to be sure. i'm gonna redo all those sensors tomorrow after work and see what i can come up with.

 

[turbo98eclipse]

i would def recheck the head and the block also. make sure the biss is in and adjusted or i wont idle properly. check the sensors listed but 90% of the time if one of those sensors were going or were bad the CEL would pop on... but it wont hurt to check

 

[TEEJ]

My main problem is that I can't get it to idle at all. If I start it and give it no gas then it dies right away. Should I just pull it and start again?

And I have no CEL at all and the car won't idle. I have to constantly give it gas. If I get out of the car it dies. I'm clueless. Should I just pull it and start over?

 

[turbo98eclipse]

pull what the motor? i mean if youve done EVERYTHING weve suggested from boost leak tests to checking the sensors voltage then id suspect something internal

 

[brian9397gsx]

sounds like the biss maybe screwed in to far ? or you have an intercooler line thats possibly off?

 

[empie1]

My car did this exact thing when the coolant temp sensor had a broken wire. Its on the thermostat housing. The one with two wires, not the single wire one with the spade terminal. It would fire up and die immediatly. Of course, it could also be any combo of idle related issues (biss or isc)...but that sounds just like mine did.

 

[empie1]

its probably something internal

No. Its probably not. He has fine compression and clearly its getting spark and fuel other wise it wouldnt start. Maybe you should not post outside of the hangout considering all of your posts are one word answers and you take your car to a garage to be worked on.

 

[TEEJ]

I have the day off on satirday so I'll replace all those sensors and adjust them all again and see what happens.