pulled codes, now what needs replacing? - TCCoA Forums
 
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post #1 of 23 (permalink) Old 03-20-2007, 09:29 AM Thread Starter
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pulled codes, now what needs replacing?

tried the paper clip trick, worked good, and had a helper write down the numbers. i had to do it twice, cuz i forgot to mention the long pauses. anywho, i discovered that all of the codes are egr related according to the tech articles, there are eight egr codes that go 3 _ _, and i have 5 or 6 of those codes written down. i dont recall exactly which ones they are, but they are all egr. what do i need to replace to get rid of these codes? bad valve? bad transducer?

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post #2 of 23 (permalink) Old 03-20-2007, 09:43 AM
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if you give me the codes I can look them up at autozone tonight ?

they cant scan your car right?

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post #3 of 23 (permalink) Old 03-20-2007, 09:47 AM Thread Starter
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they dont have a scanner they tell me. i have the codes and what they mean, but i dont what parts to replace.

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post #4 of 23 (permalink) Old 03-20-2007, 10:48 AM
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i think we have the obdII scanner but I think but not sure you can look up the codes online?

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post #5 of 23 (permalink) Old 03-20-2007, 11:03 AM Thread Starter
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chris, my car is obdI. i already said i got the codes pulled and the meanings are in the tech articles, but the tech articles do not say WHAT needs replacing. that is the purpose of this thread.

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post #6 of 23 (permalink) Old 03-20-2007, 11:24 AM
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ya in the meantime I have some valve covers to be installed

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post #7 of 23 (permalink) Old 03-20-2007, 11:32 AM Thread Starter
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i dont want to hear it

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post #8 of 23 (permalink) Old 03-20-2007, 12:08 PM
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the car is sitting (it has been for about a month) waiting for the bumper to be painted good luck with your code search

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post #9 of 23 (permalink) Old 03-20-2007, 04:56 PM
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Well if it's EGR related then it'll be one of several things. The EGR valve might be stuck open or closed, the EGR passage in the intake might be clogged, the pressure feedback sensor might have taken a dump (pretty common), the vacuum regulator might be malfunctioning, or the vacuum lines are screwed up somehow.

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post #10 of 23 (permalink) Old 03-20-2007, 05:14 PM Thread Starter
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chris, if it helps any, there is no rough idle, and the cel comes on a few minutes upon firing up the car, and also at high speeds, ~75-80, then goes away after slowing down to about 70. my gas mileage seems low as well.

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post #11 of 23 (permalink) Old 03-20-2007, 05:18 PM
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If the idle isn't rough I think we can rule out the EGR valve being stuck open. With the reduced mileage and CEL at highway speeds it seems like the EGR isn't opening or isn't flowing. Highway cruising speeds are when it's commanded most often and it helps to increase MPG. Gotta get those codes to see if it's identified a single component.

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post #12 of 23 (permalink) Old 03-20-2007, 05:28 PM Thread Starter
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ok, the codes i pulled are 35, 326, 335, 336, and 337.

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post #13 of 23 (permalink) Old 03-20-2007, 05:32 PM
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35 - EGR signal voltage too high or RPM below spec during engine run test or EVP voltage high
326 - EGR sensor circuit voltage lower than expected
335 - EGR sensor circuit voltage higher or lower than expected during KOEO
336 - EGR sensor circuit voltage higher than expected / exhaust pressure high
337 - EGR sensor circuit above maximum voltage

Oh yeah, I think it's very safe to say that the pressure feedback sensor is fubar.

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post #14 of 23 (permalink) Old 03-20-2007, 05:36 PM Thread Starter
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alrighty. will any year 3.8 pfe sensor work?

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post #15 of 23 (permalink) Old 03-20-2007, 05:42 PM
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Looks like 91-95 will work as long as it's not California emissions. You shouldn't worry since your in Texas though.

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post #16 of 23 (permalink) Old 03-20-2007, 05:50 PM Thread Starter
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ok. does the eec need resetting after replacing the sensor?

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post #17 of 23 (permalink) Old 03-20-2007, 06:30 PM
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Unless you have some other way to clear the codes (like a scanner) then yes.

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post #18 of 23 (permalink) Old 03-20-2007, 06:52 PM
 
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hey big mike ...look at the hard plastic lines on egr ..they are very brittle and crack easily ...i just got mine to pass emission test ...both lines > red and green were broken ...made cel light and code was > p0174 system too leann bank 2 < passenger side engine had 2 broken vac lines all good now ...sad for me to have to worry to fix it but car is sold on fri. nite ...something i had to do and the buyer paid for the repairs...sux now he is getting a mint car for a 94 tbird
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post #19 of 23 (permalink) Old 03-20-2007, 07:04 PM Thread Starter
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i actually thought about that. ill take a look at those lines.

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post #20 of 23 (permalink) Old 03-20-2007, 08:03 PM
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Check the vacuum lines just in case but no vacuum to the EGR valve or solenoid usually causes codes 326, 327, 332, and/or 334.

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post #21 of 23 (permalink) Old 03-20-2007, 08:22 PM
 
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i do know that they hooked a vacum line to my egr valve and said it would cause the car to fail running ,,,mine stumbled but ran...he said the vacum lines being broke caused it to run ..if it was tight vacum would stall the motor...emission passed today after 276.00 dollars later
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post #22 of 23 (permalink) Old 07-25-2007, 09:35 AM Thread Starter
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bringing this back up.

yesterday, i was recharging the a/c and heard a hissing sound. i discovered that a rubber vaccuum hose had deteriorated and broken free and was laying on the pass. side shock tower, sucking in the open air. this hose runs from a "tee" fitting on the pcv hardline to a another barbed hardline that follows the contours of the shock tower and continues towards the front of the engine bay. where does this hardline run to?

also, what are symptoms of said broken vaccuum hose sucking up air? im still getting a cel, but its not as frequent. its temporarily fixed, as i need to cut and install a new section of hose.

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post #23 of 23 (permalink) Old 07-25-2007, 11:52 AM
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That lines runs to the EVAP canister. With that hose broken, the CEL will usually be along the lines of "EVAP flow problem", but since you have OBDI I don't know how closely the PCM monitors that system or if there is a flow sensor like OBDII.

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