OK - Mechanic is stumped. any ideas??

[Mustangs_Suck]

Jesus christ..it never ends.

So ok.

Got another T25...was previously inspected and said to be in good condition.Manifold was warped, so we got it re-machined, and it's great now.Oil return line was a little "spongy" - so mechanic replaced it with a new one.

Put it all together.

Mechanic says the car runs for **** now. Idles terribly and doesn't boost at ALL.

He said he's gone over everything and he can't find out what is wrong with it.

WTF could of happened just from taking off these parts (and all things attached to them) that would make it idle terribly and no boost assuming they were put back together correctly (and he's done this before on my car, with no problem...so he's stumped why it doesn't work now) ??

Any ideas?
Modified by Mustangs_Suck at 11:16 PM 9/30/2005

[paemt6220]

I'm not the most experiened person here, but that sounds like a vacuum problem to me! Check all the vacuum lines.

Chad

[Mustangs_Suck]

I'm not the most experiened person here, but that sounds like a vacuum problem to me! Check all the vacuum lines.

Chad

It sure does, but he said he's gone over them and found nothing, maybe he just need to look harder *shrug*

[S14tat]

i would check to see if the wastegate is stuck open. also i would the air flow meter, not to mention the blades on the compressor wheel. i bent mine and it wouldn't make any boost. and it sounded weird as hell when its close to boosting. not to mention check to see if the blow of valve is leaking or stuck open.

[fiznat]

I'm thinking it is most likely a mistake on your mechanic's part. Issues with no boost are usually a boost leak before or in the intake manifold, or an exhaust leak before the turbo. Based on the things your mechanic pulled apart and replaced, the potential is there for all different kinds of leaks.

I've said it once and I've said it again... why oh why do you keep going back to this damn mechanic??

[98s14inaz]

Start checking everything with soapy water in a spray bottle. Greg and I found a **** ton of leaks on his KA-t vert when we did that. One particular one was that little selenoid/valve under the intake mani in the middle. It has this little nut in the back that was leaking air. We took off the nut, put some rtv on it and the threads, put in on, let it set up, no leaks. Car builds boost just fine now.

Recheck the mechanics work. He missed something.

[Mustangs_Suck]

i would check to see if the wastegate is stuck open. also i would the air flow meter, not to mention the blades on the compressor wheel. i bent mine and it wouldn't make any boost. and it sounded weird as hell when its close to boosting. not to mention check to see if the blow of valve is leaking or stuck open.

thank you I was thinking about the waste gate as well - but the other stuff didn't come to mind. I'll write them down and let him know.

[Mustangs_Suck]

I'm thinking it is most likely a mistake on your mechanic's part. Issues with no boost are usually a boost leak before or in the intake manifold, or an exhaust leak before the turbo. Based on the things your mechanic pulled apart and replaced, the potential is there for all different kinds of leaks.

I've said it once and I've said it again... why oh why do you keep going back to this damn mechanic??

Again - I'll write this down and let him know.

As for why - He does great work...sadly this time something happened. He also gives me huge discounts (like literally half off on labor) because he knows the trouble I've had with this car - and feels bad.

Finally - no one around here knows what the **** they are doing when it comes to aftermarket cars. I took it to a few "tuner" shops and they raped me on charges, and didn't fix a ****ing thing...just made it worse honestly.

[Mustangs_Suck]

Start checking everything with soapy water in a spray bottle. Greg and I found a **** ton of leaks on his KA-t vert when we did that. One particular one was that little selenoid/valve under the intake mani in the middle. It has this little nut in the back that was leaking air. We took off the nut, put some rtv on it and the threads, put in on, let it set up, no leaks. Car builds boost just fine now.

Recheck the mechanics work. He missed something.

I will tell him to do so - thank you

[C-Kwik]

Since it's idling terribly, I'd have him check all the intake plumbing. It possible he forgot to tighten a clamp or something when re-installing the turbo. This could both cause a lack of boost and poor idle.

I'd refrain from using soap and water to tryand locate this leak. Since you are probably not going to be able to check it effectively under boost, the system will likely be in vacuum. This means the sopay water would only get sucked in if anything. #1, it won't do much to help you find a vacuum leak. #2, do you really want to be sucking in soapy water?

Probably not an exhaust leak as idle wouldn;t be affected and you would likely hear it. An open wastegate would also not affect the idle.

[lrb_2000]

plug your MAFS back in. haha, jk, but seriously, it happend to me.

[Mustangs_Suck]

Since it's idling terribly, I'd have him check all the intake plumbing. It possible he forgot to tighten a clamp or something when re-installing the turbo. This could both cause a lack of boost and poor idle.

I'd refrain from using soap and water to tryand locate this leak. Since you are probably not going to be able to check it effectively under boost, the system will likely be in vacuum. This means the sopay water would only get sucked in if anything. #1, it won't do much to help you find a vacuum leak. #2, do you really want to be sucking in soapy water?

Probably not an exhaust leak as idle wouldn;t be affected and you would likely hear it. An open wastegate would also not affect the idle.

Will add that to the list. As far as the soapy water - it'd just be in a little spray can, not like we are dumping a bucket on it - but I understand what you mean..I'll have check all the stuff mentioned in this thread, and if it comes down to it - he'll have to bust out the spray if that's what it takes to find what leak is coming from where.

[Mustangs_Suck]

plug your MAFS back in. haha, jk, but seriously, it happend to me.

Will have him double check it

[98s14inaz]

I'd refrain from using soap and water to tryand locate this leak. Since you are probably not going to be able to check it effectively under boost, the system will likely be in vacuum. This means the sopay water would only get sucked in if anything. #1, it won't do much to help you find a vacuum leak. #2, do you really want to be sucking in soapy water?

That is why you rig a pressure cap and pressurize the system. Greg came up with quite an ingenious set up using nothing but a tire nipple and some stuff from hd. We located all of his leaks with soapy water and the system holds pressure now. I should have mentioned that in my previous post. Ask Greg about it.

[paemt6220]

Is it boosting at all? If it is, but its low boost, check wastegate LINE. That would cause a bad idle and only let you boost to the wastegate spring psi.

Chad

[onosqv]

That is why you rig a pressure cap and pressurize the system. Greg came up with quite an ingenious set up using nothing but a tire nipple and some stuff from hd. We located all of his leaks with soapy water and the system holds pressure now. I should have mentioned that in my previous post. Ask Greg about it.

When are you & Greg gonna do a write up w/ the soapy water and teh rigged pressure tester? Sounds like a realllly useful tool for everyone. May seem easy to you guys since you know what you're doing, but I can only guess how to go about it, haha.

[C-Kwik]

That is why you rig a pressure cap and pressurize the system. Greg came up with quite an ingenious set up using nothing but a tire nipple and some stuff from hd. We located all of his leaks with soapy water and the system holds pressure now. I should have mentioned that in my previous post. Ask Greg about it.

Ah. That makes more sense. Though, that's a lot of trouble to go through IMO. It would probably be reserved as a last resort thing for me.

[Craving4Boost]

is the car revving though?? if the car isnt even revving..than something is probably clogging the turbo..your mechanic may have put to much oil clogging it

[Mustangs_Suck]

Is it boosting at all? If it is, but its low boost, check wastegate LINE. That would cause a bad idle and only let you boost to the wastegate spring psi.

Chad

From what I gather it isn't boosting AT ALL. I will have him check that. thanks.

[Mustangs_Suck]

is the car revving though?? if the car isnt even revving..than something is probably clogging the turbo..your mechanic may have put to much oil clogging it

He can drive it, he just says it runs like **** and doesn't boost - so, yes, it is revving.

[SloMoe]

Is it boosting at all? If it is, but its low boost, check wastegate LINE. That would cause a bad idle and only let you boost to the wastegate spring psi.

Chad

If that was the case, wouldn't it cause the wastegate to remain shut, and continue building boost?

[lrb_2000]

depends, there could be a leak in the line, and it would case the waste to get false readings... so if you're trying to get 8psi, and there' s a leak, it wouldn't be very constant, and it would try to boost all over the place.

[98s14inaz]

When are you & Greg gonna do a write up w/ the soapy water and teh rigged pressure tester? Sounds like a realllly useful tool for everyone. May seem easy to you guys since you know what you're doing, but I can only guess how to go about it, haha.

I can't take any credit for the apparatus Greg rigged but I did start using the soap and water when we couldn't find the last stubborn leak on his set up. He just got back from atlanta and I am sure he has stuff to do, i'll ask him about it next time I see him.

[Mustangs_Suck]

Man, **** this guy...My dad called him to give him all these ideas, and he just said "I don't want to be rude to you, so I'll call you later" and hung up on him.

The guy is just on a huge ego trip, and thinks he's the best of the best, and won't listen to anyone's suggestions on what is wrong because he thinks he knows it all and wouldn't make a mistake.

I'm just going to try to get the car somewhat driveable or some **** and get it back to my house and have some friends and I look at it/work on it...this guy isn't reliable anymore - he's sick and tired of working on it, and I want my ****ing car back..it's been over a god damn month now.

[lrb_2000]

yeah... I don't let anyone work on my car, except a few friends.. I will never take it to a mechanic, that's why we have forums haha.. only time it goes to the shop is for an alignment, or to mount tires.. which last time they scratched the wheels up... it's better to do the work yourself, then you know what to look for when something goes wrong, that's how I see it.

[wild_maxx]

doing your own work is more rewarding as well. and as lrb_2000 said, you know what to look for when something goes wrong.

(ps. i sent you an email lrb_2000)

[paemt6220]

If that was the case, wouldn't it cause the wastegate to remain shut, and continue building boost?

Yes, UNTIL the boost reached the wastegate spring's pressure, then it would open! If the wastegate spring is only like 5 or 7psi(which is common on most turbo kits), that would mean you would boost to there, but no higher.

Chad

[Mustangs_Suck]

Ok..he said he found the problem..

He said the ignition coil is giving out .7ohms instead of 1ohm, and it is fouling up my plugs in a matter of minutes. He said it's all messed up electrically wise as well - so he found another ignition coil, and will be buying brand new NGK plugs and gapping them to .30 and hoping it will solve all my problems.

[onosqv]

Ok..he said he found the problem..

He said the ignition coil is giving out .7ohms instead of 1ohm, and it is fouling up my plugs in a matter of minutes. He said it's all messed up electrically wise as well - so he found another ignition coil, and will be buying brand new NGK plugs and gapping them to .30 and hoping it will solve all my problems.

So you're still going to the same mechanic?

Hope you get to drive your baby soon.

[Mustangs_Suck]

So you're still going to the same mechanic?

Hope you get to drive your baby soon.

Lol, it's been sitting at his shop for literally over a month.

He must of wigged out on something for the past two weeks, as this week monday he just started getting excited about the car, and spent tons of time taking everything apart and putting it back together again with some crazy turbo guy friend of his and is doing everything he can to get it fixed asap now.

I seriously think he's a coke addict - he has CRAZY mood swings.