My my wonderful 97Z is cursed with EGR
I have installed the ZZP egr sim....
Good news no CEL light......
Bad news.....bad hesitation and my car generally hesitates like poo. Much like Jakes hesitation I would imagine?
NEXT
I am going to swap in a 1999 PCM ECU.
My first question is I believe 1999 had some 2.4's with EGR. How do I know what PCM to purchase, perhaps a part # or something I can reference?
Second question: I have an auto so the PCM will have to be from an auto. How many different variations of PCM's are there? How specific must I be when selecting one?
Do I just match the power train features, transmission, engine ect. ?
(Perhaps I am now paying for past wrongs in my life?)
Thanks
Justin
(Fireman)
PS. In retrospect all those past wrongs were pretty fun!!!!!
~
Thanks for the help!!!!
ya that sounds like how my car was. Sucks. EGR is the devil.
I just clear the code when i start up the car, annoying, but it runs like stock now so that is a great trade off. Plus with the CEL on, it turns on the cooling fans= cools the s/c.
My advice to u, is talk to eric- jdm4drlscav, i forget his username, the gold 4dr one. Anyways, he can get u set up on the 99 ecu swap.
It really isnt that tough. this is what i know. Get a 99 ecu, or have it reflashed to 99 specs( fine a 99 2.4l and get the vin #, it pays to know people at dealerships. CRASH, has a automatic 2.4l, take his vin #). ecu can be had from junkyard websites, i snagged one years back for 26$ shipped, but sold it to hanzenrider as i have a 96.
u have to move one pin on the wiring harness, and then add one pin/wire to the new 99-02 knock sensor and that is about it.(something like 35 - 37, i forget, 30 something) and something about the theft lock- leaving the car turned to the ON position till the light stops blinking.
also, u need to have the PIN out of your computer/99 one. and some little pin/wire end little metal things u have to pick up at a dealership.
Hanzenrider might be able to help u with the computer stuff, i sorta helped on his car, and nick- changeforabutton.
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Thanks Jake I appreciate the input. It hit OrangeZ with an Email.
I still have the physical EGR parts connected to my vehicle as the SC wont go on till March sometime. Wonder how the EGR valve works. Is it computer controlled or controlled be exhaust gas temp?
Justin
egr is stupid.
It is just there when u start up the car, the computer see's if it works. Probably something like letting warm air into your intake manifold so the car warms up faster.
I have drove 150 miles non stop and the EGR light doesnt come on, i just have the plug dangling there. Then i shut off the car and start it up again, 30 seconds later the CEL comes on, i clear it and i am on my way. <br>
Jake wrote:
My advice to u, is talk to eric- jdm4drlscav, i forget his username, the gold 4dr one. Anyways, he can get u set up on the 99 ecu swap.
gee thanks ekaj , i love you to man !!!
LOL
but all you need is a friend at the dealer and a VIN # from a 99 non-egr auto trans cav , to reprogram your 97 pcm
all the 99 cavs ive seen all were non-egr , i do know there are some 99 with egr out there , but very few
ive got the pin #s and part #s for the knock sensor and the connector end at home
i wish i knew what happened to the VIN # i had in my PCM , i had it written down , but it got lost
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Quote:
Wonder how the EGR valve works. Is it computer controlled or controlled be exhaust gas temp?
The PCM commands the EGR to set an appropriate pintle position based on TPS and MAP. The PCM monitors the reaction of its commands through a feedback signal from the EGR. So the PCM checks the EGR for changes when the PCM commands a new EGR pintle position. If for any reason the PCM can't confirm information from the EGR, check engine light. <br>
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<img src="http://home.nycap.rr.com/xenox/jbody/jbody_shocker.jpg">
My egr used to open whenever it felt like it (especially when the car was cold and at low rpm) causing major hesitations and often times it would nearly stall. I battled that bitch for about 3 months trying different things like an egr blockoff plate with no hole and then with a variety of hole size revisions and even a custom board to fool the computer that everything was ok when I disconnected the egr. I read thru the wiring diagrams for the car and the "theoretical operation" of the motor/ecm to find what the conditions were when the egr valve was supposed to be allowed to open.
I learned a lot, but all in all it was miserable. I decided to hook it all back up normal with no blockoff/restriction plates and replace the coolant temperature sensor thinking that maybe, just maybe, the ecm thought the car was warm when it actually wasn't and was allowing the egr to open at incorrect times. Well, the problem went away, just like that. I was half pissed off that I went thru all the other stuff but half tickled pink because the problem was gone.
Your problem may or may not be the same thing, but I just figured I'd share my story.
Goodluck!
Nice.....I did not know I could re-flash the 97 PCM with the 99 data!
Anyone out there have a 99 Auto 2.4 they can provide me with a vin # for the re-flash?
I did disconnect the ZZP egr sim and the lag is gone
Sucks that did not do the trick!!!
Thanks for the help everyone...with a little praying to the car god I should be in business for my supercharger by March!!!!
Justin
(Fireman)
hey justin i got your email
i got a egr sim and it works great on my engine
some people have been known to have problems i beleave jake did
the best way to go about it is a 99ecu swap but the easiest way is the sim
Cool......BTW Ebay motors is the shizzy.
They list vin #'s for cars. forgot about that route
I will just have to take a chance it's a 1999 with no EGR!
Justin
(Fireman) <br>
Check out PhatNLow.com to see our local crew and purchase performance parts!!!!!!
i emailed a reply to you
only thing i couldnt find was which of the wires went to which 1 on the 99 knock sensor
so if anyone has the engine diagram for the 99 2.4 it would be helpfull
i know what pins the grey and blue go into at the pcm , just not what the colors go to on the knock sensor
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[quote=97cavie24ls(JDM cav sedan™)]i emailed a reply to you
only thing i couldnt find was which of the wires went to which 1 on the 99 knock sensor
so if anyone has the engine diagram for the 99 2.4 it would be helpfull
i know what pins the grey and blue go into at the pcm , just not what the colors go to on the knock sensor
.... did you read my post? I put up the freakin' instructions man.
-Chris-
<br>
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
I saw the post and I appreciate the instructions. (I know you were not taking to me
) So you drove around with the new 2 wire knock sensor plugged into the PCM with no ill effect with the original programing.
Have you since had your PCM re-flashed to the 99 specs?
Justin
(Fireman)
I was not aware you also had the origional knock sensor still operating. Well it looks like I'm on the path to a reflash and wiring project in the near future.
Question: Does the origional knock sensor wire up to a different location other than the blue harness? I dont want that to be a problem!
Justin
(Fireman)
SunfighterGT wrote:here is where things got shiatty. The Knock sensor was missing half of its connector, so I just cut it off the connector... the problem is one wire is greyish white and one is red. I assumed red meant blue on the PCM and Grey meant grey.
i did read your instructions , but if you read what i left in the quote , you werent sure which wire went were
and i would have looked at my harness for the wires , but they are all in the loom with the stock wires
also i gave him the part # for the connector for the knock sensor , so you do not have to cut the plug off
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Well it's nice to know that the PCM will not react adversely to the fact that their a two knock sensors installed with the original 97 programming or the 99 programming.
Is their a downside to having two knock sensors?
Is the new 1999+ knock sensor a different design...possibly more sensitive?
Where is the knock sensor located? I looked in my Chiltons and know what to look for...just don't know where to look?
Thanks
Justin
(Fireman)
knock sensor is located out back under the exhuast manifold, on the drivers side sorta. u would just leave that one in place/ un hook it., and put the new one up near the oil filter, there are some open spots there that will work.
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Super sweet...thanks Mang.
If I dont have the reflash done right away but change out the Knock sensor to a 2 wire, Wont I throw codes as the 97 programming wont recognize the new 2 wire set up?
Justin
(Fireman)
Totally makes sense.....Thanks everyone!!!!!
I will have to start working on it once the temp. gets above 0 hopefully some time in the near future. What ever it takes to remove the EGR is what I will do to get the SC installed with the proper clearances.
PS. If you happen to cross paths with the person who created EGR though probably old punch him in the face for me!!!!!
Thanks
Justin
(Fireman)
Back from the dead...
'99 Knock Sensor - grab from AutoZone?
Reflash - will any dealer do this? I don't have an 'in' at the dealership otherwise.
Matt S.
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