I'm getting nowhere diagnosing my car. Lots of details inside.
12-18-2008, 12:59 PM
#21
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c'mon now... AW is my technical 'go-to'. AF is where I normally troll.
Un-modding it is for now....
I really feel like plugging that crap back in is only going to mask the issue. If I came on here saying I did a coil pack delete, and now my car won't run smooth, I could see how plugging in that last pack would fix the problem.
But...
These cars shouldn't NEED the N75, N249 or SAI (or muffler) to run right though, and it's not uncommon to remove them, and I've NEVER heard of anyone having such issues.
I'd also like to clarify, the MBC is not on there to try to squeeze out some more power w/o being chipped. Its set at 14psi. N75 failed on me at one point, so I replaced it with a mechanical controller. I HATE all these little electronic gizmos everywhere. All my engine related 'mods' were put in place after the stock stuff started acting up. All my REAL modding is focused on handling/braking. I'm happy with 225hp (that is, when I actually have it)
I really feel like plugging that crap back in is only going to mask the issue. If I came on here saying I did a coil pack delete, and now my car won't run smooth, I could see how plugging in that last pack would fix the problem.
But...
These cars shouldn't NEED the N75, N249 or SAI (or muffler) to run right though, and it's not uncommon to remove them, and I've NEVER heard of anyone having such issues.
I'd also like to clarify, the MBC is not on there to try to squeeze out some more power w/o being chipped. Its set at 14psi. N75 failed on me at one point, so I replaced it with a mechanical controller. I HATE all these little electronic gizmos everywhere. All my engine related 'mods' were put in place after the stock stuff started acting up. All my REAL modding is focused on handling/braking. I'm happy with 225hp (that is, when I actually have it)
12-18-2008, 01:44 PM
#22
When it runs fine before the mod, and lousy after....>>
Logic would say your mod, or the execution thereof had some causal affect. The fact that a botched Catch can install resulted in a blown head gasket should convince you to back away from the car! Revisit that whole head install. You missed something somewhere..
12-18-2008, 03:14 PM
#23
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like i said, i'll de-mod, and see where I am. feeling doubtful though.
it's not like i haven't thought over the head gasket thing. not many places to 'miss' something, not that complicated a job.
probably report back this weekend after i've had a chance to replumb some stuff...
probably report back this weekend after i've had a chance to replumb some stuff...
12-20-2008, 05:36 AM
#26
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IF all these parts were unnecessary - Audi would have not installed them in the first place.....
why add cost when you don't need it. Sure - you can eliminate some of the parts and the car will still run and i've read enough about the 1.8T over the past 10 years to know which mods work and which don't. The is absolutely nothing to be gaining by removing the parts except aesthetics.
12-20-2008, 07:29 AM
#27
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OK, I thought I had troubles...
I'd approach in this manner..
1ST: pull valve cover, check cams marks, and cam pulley and crank and tranny for TDC
2nd: Check your vac lines, sounds simple but with the head off and all the mods you've done you may be missing some check valves or have lines hooked up backward.
3rd: as much as I hate to say it you need to de-mod, get to a baseline so that you can find your real problem.
1ST: pull valve cover, check cams marks, and cam pulley and crank and tranny for TDC
2nd: Check your vac lines, sounds simple but with the head off and all the mods you've done you may be missing some check valves or have lines hooked up backward.
3rd: as much as I hate to say it you need to de-mod, get to a baseline so that you can find your real problem.
12-20-2008, 07:56 AM
#28
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Re: IF all these parts were unnecessary - Audi would have not installed them in the first place.....
<center><img src="http://www.42draftdesigns.com/images/dealers/sms.jpg"></center><p>I can agree with Joe... But as far as your stumble issue is concerned, it sounds like your MAF... The MBC IMO is a bandaid and owning a Audi you should be able to spend the 90 bucks to fix that issue. I would Never remove a part and replace it with Bo BO parts just to save 90 bucks... Only for diagnostic purposes only I may install it one if I didnt have a choice.
The best way to tune your car is to get it back to OE standards and go from there. If you replaced the MAF before, it still doesnt mean its not bad... This is why I said to get a known good one to test it out. Or get a multimeter and check your output or even a VAGCOM to check your specs. It is almost impossible to diagnose these cars without knowing your actual values and what the requested or stock spec is. Just my 2 cents.
The best way to tune your car is to get it back to OE standards and go from there. If you replaced the MAF before, it still doesnt mean its not bad... This is why I said to get a known good one to test it out. Or get a multimeter and check your output or even a VAGCOM to check your specs. It is almost impossible to diagnose these cars without knowing your actual values and what the requested or stock spec is. Just my 2 cents.
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