1G: Bad ECU? Lean WB zero power

[snakeyes711]

I'm guessing this is where I need to post. My DD 1GB has a bad problem I have zero power, almost no boost charge, and it goes lean around 5K...like massive lean falls on its face and I seen 18 on the WB... didn't do that anymore. The ECU pulls back timing to nothing. knocks like crazy. No power, turbo won't spool past 4PSI. (gauge should be turning around backwards, there isn't even a line running to the Actuator)

Thing is it runs decent in Closed loop, as soon, and I mean as soon as the gauge goes into boost theres nothing it sounds like a honda. The logger is working fine, and picks up data no problem, so I'm wondering if the ECU could be fine.

It doesn't overheat though things feel hotter under the hood.

Here are things I have done, and checked and replaced.

Replaced

fuel filter, FPR, wires, plugs, fuel pump, turbo, MAS

Checked

Coils, BLT, blew compressed air through the fuel lines, checked the fuel lines for flat spots, and crimps, to no avail.

Tomorrow, I'm going to pull the ECU,a nd look at the caps, here are things I've had done to the car.

GenII MAFT, LM-1 WB, 560cc Evo's(pink) 2G mas, pod filter. 16G turbo. Walbro 190, s,2G Exhaust MAn., Evo o2 2 1/2" stainless Exhaust...Can't think of anything else right now.

I am thinking about taking it back to stock parts until I can resolve this issue, as this is my DD.

[snakeyes711]

I swear it looks as if I'm missing something that goes right here...

Can anyoe confirm this? Do these spots look like a problem. Maybe the popped off?...Or bunt off?

Does this White stuff look ad or is is it thermal paste?

[steve]

The caps leaked and somebody did a cheap repair job on the ECU.

The white coating is what happens when they use the wrong solvent to remove the waxy conformal coating on the board. The two big green capacitors on the bottom are to replace some of the missing little SMD capacitors on the top and the disk capacitor on the cop to replace another of the missing SMD caps.

[snakeyes711]

Ahh, I see, what are those little pieces that blew off?

[steve]

Surface Mount Device capacitors in the two lower boxed you drew. The upper box seems to be around the corrosion to a SMD diode. You didn't mark the damage to the SMD cap by the processor where you can see the wire come through the board and connect with the pin on the CPU.

[snakeyes711]

Oh I gotcha now, the only reason I circled the upper ones its because I felt that those two spots had once had something there, about that size. I was sure of it.So your saying the orange disc cap, and the two green ones are to replace the ones missing... Can this one be repaired. I read an article about the ISC going bad that can ruin your ECU, I'm wondering if the drivers they were talking about are shot...Or the whole unit is shot? I found a good eprom on ebay for 260. thinking maybe I could get this one fixed as Spare.


Not sure what other damage you see by the processor?

[c2ypt1c]

Originally Posted by snakeyes711

Can this one be repaired...Or the whole unit is shot? I found a good eprom on ebay for 260.

I would just get a new ecu and be done with it. $260!?! You really should keep an eye out on the classified section here on tuners. Just taking a look right now, I saw a 1g eprom going for $80...

1g Eprom ECU *reduced* - DSM Classifieds

[snakeyes711]

....whatt now?...New ECU didn't solve the problem........................................... ..................

Originally Posted by c2ypt1c

I would just get a new ecu and be done with it. $260!?! You really should keep an eye out on the classified section here on tuners. Just taking a look right now, I saw a 1g eprom going for $80...

1g Eprom ECU *reduced* - DSM Classifieds

I'm going to cry........

[H@xtGSX]

Did you get one locally, or have someone overnight ship it?? How'd you get another one so fast?

Check the fuel pressure? Fuel pump voltage? MAFT compensation?

[snakeyes711]

Originally Posted by H@xtGSX

Did you get one locally, or have someone overnight ship it?? How'd you get another one so fast?

Check the fuel pressure? Fuel pump voltage? MAFT compensation?

Yeah over nighted....And that was not the problem.....

Checked fuel pressure, changed the pump, got 12V at the pump Changed the Injectors out a wile ago. Same difference............Did I mention I got a 280 dollar ECU for nothing?

I don't get it, It starts, and idles fine. Cruise is ok, As SOON as you put load on it boost gauge rips out 4PSI, then about 4-5K BOOM totally lean if I back off the WB stays lean for 10 seconds before it goes back to normal.

[c2ypt1c]

Originally Posted by snakeyes711

I don't get it, It starts, and idles fine. Cruise is ok, As SOON as you put load on it boost gauge rips out 4PSI, then about 4-5K BOOM totally lean if I back off the WB stays lean for 10 seconds before it goes back to normal.

post log?

[snakeyes711]

I can post a log but I cant post the WB as its not tapped to MMCD.

[snakeyes711]

I still have never solved this problem I've changed a lot of parts, and checked a lot of things. Nothings works. I seen iun the MMCd logger I'm getting 9.9MS on injector pulses when I get on it.....I'm at a loss.

[GSTurbo1]

Is the wg actuator rod hooked up to the flapper. I bet it's not. Try a spark plug change too

[snakeyes711]

It has a brand new OEM Wastegate actuator, and it is connected. Plus it shouldn't peg out lean if the wastegate isn't connected.

[snakeyes711]

I just got time to test all the engine sensors,and were all good. I am thinking I'm barking up the wrong tree? Maybe its Mechanical?