Something happened... not sure what... need advice.

[AlaskaBound]

I was just driving down the road last night and I felt like the acceleration pulled back on me... almost like pulling the reins on a horse or something... and then I pulled off on a side road and when I stepped on the pedal, the car accelerated, but almost like a governor was on it, and then it kicked in to normal acceleration... This morning, my SES light was on.... ?????? WTF happened?

[bama]

Not really sure sounds like the vehicle went into fail safe mode, on some with some mechanical or electrical problems they will lock the transmission into overdrive so minimal damage is done to the vehicle, SES... for example on Nissans if they have and ses code for engine over temperature the car will go into fail safe, has anyone pulled codes for you yet.

[AlaskaBound]

Originally Posted by bama

has anyone pulled codes for you yet.

No, just happened last night... Dweb posts are saying it could be the VSS or the throttle cable... I don't know what else it could be... Could it be fuel related, like a fuel filter being clogged or power to the fuel pump?

[Disco Mike]

Don't worry or guess, go get your codes read and if the is still a question, get the codes numbers posted so we can help you.
Mike

[AlaskaBound]

Originally Posted by Disco Mike

Don't worry or guess, go get your codes read and if the is still a question, get the codes numbers posted so we can help you.
Mike

OK, Background: 99DII swapped with 4.6... I used the 4.6 heads. I've been on this motor for a little under 1,000 miles now... Running great until last night.

Took it to get the codes read from a non-dealer source 30 minutes ago and here's the initial diagnosis..

1. All 4 O2 sensors malfunctioning (All 4 are Brand new)
2. Camshaft position sensor circuit malfunction (Brand new sensor)
3. Mass Air Flow Circuit Low Input (Brand new Mass Air Flow unit)
4. EVAP Control System Purge Control Valve AND Vent Control Circuits Shorted
5. Cylinder 3 Misfire
6. Unknown Trouble Code

Since most of these things malfunctioning are brand new, could my ECU be damaged or is it definitely an electrical problem? The O2 sensors and misfire code were diagnosed a month or so ago, but just after what happened last night, the code's #2,3,4,& 6 are now showing up...


I made an appt. with the dealership to have the codes read on their machine on Monday but expecting some of the same codes...

[Disco Mike]

What were the exact fault code numbers?
Mike

[AlaskaBound]

Originally Posted by Disco Mike

What were the exact fault code numbers?
Mike

P0135 02 sensor heater malfunction (Bank 1, Sensor 1)
P0155 02 sensor heater malfunction (Bank 2, Sensor 1)
P0141 02 sensor heater malfunction (Bank 1, Sensor 2)
P0161 02 sensor heater malfunction (Bank 2, Sensor 2)
P0340 Camshaft Position Sensor Circuit Malfunction
P0102 Mass or Volume Air Flow Circuit Low Input
P0445 EVAP Control System Purge Control Valve Circuit Shorted
P0448 EVAP Control System Vent Control Circuit Shorted
P0303 Cylinder 3 Misfire
P1884 Unkown Trouble Code

That's A LOT of F-N CODES!!!!! @#$%!!!!!!!!!!!!!

[Rovin4life]

I suspect the carbon in the throttle body froze it up.

but I also suspect extra carbon in the head causing possible problems with purge valve.

Its not possible that you trapped any wiires at all is it. take a good look.

Was it running fine the first time before the codes came on or after the event.

[Disco Mike]

Alaska,
Boy do you have a can of worms there, you may be right, the ECU may be causing this and should be tested, let us know what you find.
Mike

[Dan Erickson]

Originally Posted by AlaskaBound

That's A LOT of F-N CODES!!!!! @#$%!!!!!!!!!!!!!

Yup, sure is.

So many in fact that I wonder if maybe you may want to start with checking your grounding before looking at ECU.

Peace,

Dan

PS, Did not think DIIs had VSS.

[AlaskaBound]

Originally Posted by Rovin4life

Was it running fine the first time before the codes came on or after the event.

It was running fine before... great actually...

[AlaskaBound]

Originally Posted by Dan Erickson

Yup, sure is.

So many in fact that I wonder if maybe you may want to start with checking your grounding before looking at ECU.

Peace,

Dan

PS, Did not think DIIs had VSS.

How many grounds are necessary? I would think only one...

[AlaskaBound]

Originally Posted by Disco Mike

Alaska,
Boy do you have a can of worms there, you may be right, the ECU may be causing this and should be tested, let us know what you find.
Mike

Mike: What about checking all grounds, inspecting wiring harnesses, and fuses?????? Any advice on where to start there? I feel like it's a centralized issue considering all the unrelated codes... I don't think I'm going to have to deal with each code individually, maybe one fix will cure 3 or 4 or maybe all of them... what do you think?

Are you on Dweb too? If you have time... check this post out... I'd like your feedback... It relates to this subject but also relates to the 4.o-4.6 swap and remapping the ECU... Thanks a ton!!! http://www.discoweb.org/forums/showt...eferrerid=2871

[AlaskaBound]

*UPDATE*
I heard from the dealership... Sort of confirmed what many people said on Dweb... They said the rear driver's side engine ground that is currently connected from my firewall to the exhaust manifold is not as effective as being connected to my head... They also said that the rust from the manifold may have corroded the ground strap and the heat may also be affecting it...??? They suggested to replace the strap with a new one and connect it to my head instead.

My other ground strap to my alternator bracket also needs to go on... that was never put back on for some reason... My fault. I already knew this needed to be done and the part came in, so I'm going to put that on...

They also said that my e-brake cable got burned up from my engine not being correctly grounded. I remember when I first started to crank it over after the swap was done that their was a small amount of smoke coming from the center console. The dealership said that if the ECU can't find a ground, it seeks one out and it happened to be my ebrake cable.

I also needed an O-Ring for my MAF sensor... Total estimate from dealer, including fixing my e-brake: $1,045.00.

[Disco Mike]

Ouch!!!