12 replies to this topic

[ruff]

I was getting a check engine light (c.e.l) lately and just found out why.
I did a code search and these are the result so far

0413 sai  valve open
1411  egr related issue
0444 evaporative emission open
1407 EGR No Flow Detected
0447 - Possible open circuit, check the connector at the evap canister for water and corrosion as this part is exposed to the elements and wet weather will cause moisture to enter the connector and replace the part as soon as possible your gas mileage will improve

I did some search and many problems are related to EGR and SAI and except 0447 (it sounds like i need a new gas tank please let me know if that's the case )

I understnd that i have to remove the plenum to get to EGR and SAI to fix these codes so i was thinking of put a blanking plate on the manifold in between the manifold and EGR
pipe (seal it off ) and plug the SAI system while I have the access.
Should this procedures get rid of some of the codes? Or make worse.
I like to get some advise before working on the car.
Thanks in advance!

Happy Motoring

Mike

Edited by ruff, 20 June 2012 - 09:05 PM.

[V8 FOU]

First thing to do is to clear the codes and try again. When i had a fault in the wiring from the battery, it threw up 32 codes!!

[ruff]

32 codes! Thats a record.
Thanks for the advice FOU. I tried clear the codes three times but it came right back.
Also I checked the B7 fuse and it was fine.
I am going to remove the plenum tomorrow and like to know any negative side effect by pluging the EGR and SAI.
Also does anybody have an experience dealing with P0447 code ?

Thanks once again.

[WEllison]

If resetting the ECU and the error codes does not solve the problem, then I would suspect a wiring problem, if all these errors began at the same time. All of these errors are "sanity check" errors by the ECU which reports open circuits determined by the ECU when no voltage is appearing on the sensor lead. A 5.0VDC reference voltage is supplied by the ECU to all sensors, I suspect this wire is broken somewhere and not providing the voltage to the specified sensors.

You cannot seal off the EGR pipe if the car is a US spec car as the ECU will generate a P0401 error code. The ECU monitors a temperature sensor in the plenum to verify that the EGR valve is opening.

[ruff]

Hi WEllison, Thaks for your input.

I thought about sealing off the EGR valve could triggered (C.E.L. ) also.I was hoping for it didn't.

It might be the just wire gone bad ( i will check that first) but there is also a sign of gas smell after driven

for 10 min or longer and rough idle at the stop. The error code im getting matches with my symptoms.

Has anyone gone through a similar situation like me?

Any input would be appreciate it very much befor I go any further.

Edited by ruff, 22 June 2012 - 06:01 PM.

[Günter]

general thought for the odd *fuse B7* blow:
-if you all take a serious look into the workshop manuals, there on the so called 'grey pages' for the wiring harness ('revised harnes *98' is the reference note for the later cars on the #pdf copies)
-watch out for the 'fuses & relays' note in comparision on 4pot & V8 ..from my impression there is a mistake between V8 and 4pot cars, as such that on V8 the O2-heater circuit (that is powered with high amps!) can cause a imidiate blown fuse as soon as you turn on the ignition (O2-heating cycle starts normally if you turn the key)
-if there is a fault in one of the O2-sensor heater-circuits they can produce the shortcut on this fused line.

I had those *Evap/emission* fault codes once, several years in the past -and my car is only Euro2 rated, with German registration so a car without EGR/Airpump and without this additional EVAP control block on the front left hand engine bay.
A totally rotten lamda probe/O2-sensor was the reason (pictures may be still in this forum, it was the reason for my 'detective searches' in the parts reference where I came up with the cheapish replacement sensor discussion on the *Lada* cars..some of you may recocnise it)


So if it comes to those codes on a car without all this stuff -first inspect what your O2-sensors do, if you unplug them one by the other (will the Evap codes come back after deleting of the memory..?)

****************************************************************************************************************************************

ruff
-if you can smell petrol after the car was driven, and there is no leak on the injectors, none on the fuel tanks and none on the Evap-pipe going into the plenum ..does your charcoal cannister just run over with fuel by any chance ?
-or is it not ventilated in the right way, such that the engine can not use the refreshed 'fumes/gases' out of the charcoal canister

(as it normaly works like a 'gas trap' : -the ambient air can re-activate temporarly (by a open valve -triggered by ECM) the fuel that was getting devaporised by influence of the charcoal, and if it is acting the engine gets those fuel 'fumes'/vapors and burns them while running. )

Edited by Günter, 24 June 2012 - 09:55 PM.

[redshift]

I'd agree with Wayne about the lost supply somewhere, especially if my wiring loom is anything to go by. I guess I had to clean up around half of all the connectors as they were showing signs of poor contacts. Also the engine loom tends to get cooked and go brittle, mine has now been changed.

[Che]

You cannot seal off the EGR pipe if the car is a US spec car as the ECU will generate a P0401 error code. The ECU monitors a temperature sensor in the plenum to verify that the EGR valve is opening.


I have a US spec and deleted my EGR piping. I blocked each holes from exhaust manifold, at the heads and blocked the egr valve at the plenum. I deleted my air injection unit from the driver side head too but I didn't get P0401.
No cel at all. Why?
However, I left the EGR wire plug at the EGR valve under the plenum

Edited by Che, 22 July 2012 - 04:42 PM.

[ruff]

Hi Che,

What kind of ECU do you have ? (stock or tuned)
Any gas smell from inside? or problems with readiness test?

Right now i am getting EGR related error codes ( P1407 ,P0402 )
I much prefer to plug the EGR pipes and delete the air injection unit if i can get no CEL
How difficult is it to block the EGR valve?

Thanks for your input.

Mike

[Che]

I just followed Mike Sekinger's instruction. But I think Mike deleted the EGR completely at the plenum.
I did not take EGR unit out, I just blocked them and retain the EGR wire (connected to the EGR unit).

Blocking is very easy. All you have to do is copy the metal gasket of the pipe. Use the hacksaw - grinder & drill - that's about it.
Two identical block: use a steel at the exhaust manifold and aluminum at the EGR valve at the plenum.
On the right head, go to the hardware store and buy a brass blocking bolt cap. On the left head is different hole. Simply cut a piece of
thick aluminum put a rubber o'ring and block the hole (one thread hole).

I have USA ECU with Johan chip and yes, I deleted my air injection too and unplugged the wire of the pump at the trunk.

Edited by Che, 22 July 2012 - 09:51 PM.

[ruff]

Mike Sekinger helped me a lot with his knowledge.

I think the tuned ECU is the reason why you are not getting the CEL.
Most likely I will replace the EGR unit.

I will update you with the progress.

Thanks once again.

[Che]

• PM me or you can call me if you have any question.
• I see you live in Toronto, I always go there and visit my mom. Lakeshore blvd near the park.

[ruff]

PM sent

Thanks!