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Neo1130
12-28-2005, 06:05 PM
What I don't get is the Short to Ground and Open Circuit for the N75... Also how I can run too rich then too lean... Could the misfires be because of my plugs I just installed? NGK V-Power BKR6E's but they are resistor plugs and don't know if that matters... In all seriousness, I think that 99% of these have to do with the Split Second boost controler that is in there which I am taking out and hope that no one butchered the stock wire harness too much for the ECU!! Oh yeah, and the car has a random miss/hesitation/lack of power too!! Never felt limp mode before but I am guessing this is it!? But I only got a CEL for the first set and no CEL for the 2nd... So I guess it isn't limp cause the CEL never came on... But I go to floor it and feels like NO boost at all or even like the engine is on!? I just want to get the car fixed and chipped the right way!




8 Faults Found:
17955 - Boost Pressure Regulation Valve (N75): Short to Ground
P1547 - 35-10 - - - Intermittent
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16685 - Cylinder 1 Misfire Detected
P0301 - 35-00 - -
17536 - Fuel Trim: Bank 1 (Mult): System too Lean
P1128 - 35-10 - - - Intermittent
16687 - Cylinder 3 Misfire Detected
P0303 - 35-00 - -
16686 - Cylinder 2 Misfire Detected
P0302 - 35-00 - -

2 hours later after clearing other codes....


17956 - Boost Pressure Regulation Valve (N75): Open Circuit
P1548 - 35-10 - - - Intermittent
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -
17736 - Knock-Control: Cylinder 4: Regulation Limit Exceeded
P1328 - 35-10 - - - Intermittent
17734 - Knock-Control: Cylinder 2: Regulation Limit Exceeded
P1326 - 35-10 - - - Intermittent
17536 - Fuel Trim: Bank 1 (Mult): System too Lean
P1128 - 35-10 - - - Intermittent

Neo1130
12-29-2005, 04:55 AM
No body?! Pft... Newbs always get help asap!! :) Nah but really, do you guys think the plugs have anything to do with the misfires? Also the Split Second Boost Controler!?

Daft
12-29-2005, 07:55 AM
Originally posted by Neo1130
In all seriousness, I think that 99% of these have to do with the Split Second boost controler that is in there which I am taking out and hope that no one butchered the stock wire harness too much for the ECU!!

That pretty much spells it out to me......

You've got an electronic valve that opens/closes based on the signals from the ECU. Then you take an electronic boost controller and slap it in there to turn up the boost.

http://www.splitsec.com/products/1.8TBCS/1.8_BCS.jpg

The boost controller is going to push your A/F ratio all over the place since you have no fuel or timing adjustments to match this increase in boost.

You have accomplished 3 things:

1. Confused the hell out of the N75 valve.
2. Caused the motor to knock like crazy.
3. Wasted $250 on the BC when you could have bought a chip for about the same price.

Hopefully, you can return it and get your money back.

Neo1130
12-29-2005, 08:07 AM
Thanks for the info!! But... I just bought the car on Saturday and came with a few mods... That is why I am ripping it out!! I am going to remove it, clear codes and see if they come back!!

Daft
12-29-2005, 08:51 AM
Ohhhhhhhhhhhhhhhhhhhhhh.

I understand now. I was shocked when I read about the BC. I couldn't understand why you would have put one of those in...[:p]

The one big problem I see here is that you don't really know how long it was in use and how high the boost was set when the previous owner used it.

If I were you, I would do a compression test ASAP and make sure that the previous owner didn't toast any rings.

Neo1130
12-29-2005, 09:06 AM
I am sure there is a bit of damage to the bottom end because it doesn't seem like there is much compression...

Neo1130
12-29-2005, 09:52 AM
Ok, compression test came back fairly good I think... Not perfect by any means... But starting front to back...

150
146
162
165

So take the 146 and 165... They are within 12% of eachother which isn't bad....

Daft
12-29-2005, 10:21 AM
Did you try the test when the motor was warm or cold?

It might even test higher when warm.

Otherwise, it seems in good condition. 43 Psi is the largest allowable difference between all cylinders.

Technically, the compression on a new AEB or ATW motor can be anwhere between 145 - 188 Psi on each cylinder. Not too bad.

When are you doing the seafoam??[;)]

Neo1130
12-29-2005, 10:28 AM
LOL, already did the seafoam!! But yeah, the engine was run around the block so it warmed up a BIT but not really enough for what a "warm" engine should be... I could touch the turbo when I was done but it still hurt a bit!! LOL!!

Neo1130
12-29-2005, 01:15 PM
Well, so far, I have seafoamed, another set of plugs, removed the boost controller, cleaned the air filter, did a TB alignment and it is still kinda hesitating/missing... Mainly if I go WOT from a very slow crawl it just seems to hesitate/buck/miss... Shit... I just realized that when I went to change the oil today that when I got the car it had 1 quart over the full mark... CRAP!! LOL!! Could I have a clogged cat?! I haven't checked for new codes...

Daft
12-30-2005, 07:30 AM
Originally posted by Neo1130
Well, so far, I have seafoamed, another set of plugs, removed the boost controller, cleaned the air filter, did a TB alignment and it is still kinda hesitating/missing... Mainly if I go WOT from a very slow crawl it just seems to hesitate/buck/miss... Shit... I just realized that when I went to change the oil today that when I got the car it had 1 quart over the full mark... CRAP!! LOL!! Could I have a clogged cat?! I haven't checked for new codes...

Are you still getting the above codes after all these changes?

Clear the codes out and start over.

Give me a current list of codes that you receive after that. There could be a large number of possible problems (ICM, coils, ECU, fuel system, etc...)