Code 332 Help (Insufficient EGR Flow)
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From: Hurley, MS
Code 332 Help (Insufficient EGR Flow)
Consistently getting 332 and CEL now. I initially assumed it was because i broke a vac line from the reservoir during replacement of the dizzy. Nope. not the case.
During KOEO i get the following now: 111, 10, 332. The 332 also shows up during KOER test. More details:
CEL would sporadically come on and go out when first bought a few weeks ago. 332 code. Now, i can clear the code, start, and let it idle without incident. CEL stays off. Son can drive it about 1000 ft and CEL comes back on. Sits overnight, or for any period of time really, and the CEL is off but comes back on shortly after truck starts moving. Again, only code coming back is 332
We replaced the DPFE (what i call the EGR diff press sensor) with no change. I question if the part from the store is correct because while the connecter seated, it's 'different' overall then the original. It's different also in the layout of the HI and REF ports too. But, installed anyway. Specific part bought is this one: DPFE
Did notice at idle, air was being pushed out both the HI and REF hoses equally. Hit the throttle a couple times and exhaust air flow increased equally from both hoses. My conclusion is maybe the DPFE wasn't bad to begin with but leaving the new one on for now.
My next test will be the actual EGR valve. I plan on pulling that tomorrow and checking that, as well as the passages into the Intake. Read on here to check if clogged or restricted, and to see if diaphragm moves. at idle it feels like there's a slight suction from the vac line that goes to the egr. will have to check that again tomorrow as well as when throttle is applied.
As for the vac lines, it looks like the line from the EGR runs to the passenger side and connects to a tee, with one from the tee going to the air reservoir, another one to the read bottom of the air intake box, and another line that i haven't traced out yet.
Anyone
* have any thoughts on where i should go or do? For the 3.0L it seems many posts are for 1998 or higher trucks and reference an ODB-II P-code and look different when pics are provided. this is for a 1994, 2WD XLT extended cab, with a 3.0L
* have a vacuum diagram for this truck? The original one on the truck appears to have faded away. It's basically a blank white sticker now.
During KOEO i get the following now: 111, 10, 332. The 332 also shows up during KOER test. More details:
CEL would sporadically come on and go out when first bought a few weeks ago. 332 code. Now, i can clear the code, start, and let it idle without incident. CEL stays off. Son can drive it about 1000 ft and CEL comes back on. Sits overnight, or for any period of time really, and the CEL is off but comes back on shortly after truck starts moving. Again, only code coming back is 332
We replaced the DPFE (what i call the EGR diff press sensor) with no change. I question if the part from the store is correct because while the connecter seated, it's 'different' overall then the original. It's different also in the layout of the HI and REF ports too. But, installed anyway. Specific part bought is this one: DPFE
Did notice at idle, air was being pushed out both the HI and REF hoses equally. Hit the throttle a couple times and exhaust air flow increased equally from both hoses. My conclusion is maybe the DPFE wasn't bad to begin with but leaving the new one on for now.
My next test will be the actual EGR valve. I plan on pulling that tomorrow and checking that, as well as the passages into the Intake. Read on here to check if clogged or restricted, and to see if diaphragm moves. at idle it feels like there's a slight suction from the vac line that goes to the egr. will have to check that again tomorrow as well as when throttle is applied.
As for the vac lines, it looks like the line from the EGR runs to the passenger side and connects to a tee, with one from the tee going to the air reservoir, another one to the read bottom of the air intake box, and another line that i haven't traced out yet.
Anyone
* have any thoughts on where i should go or do? For the 3.0L it seems many posts are for 1998 or higher trucks and reference an ODB-II P-code and look different when pics are provided. this is for a 1994, 2WD XLT extended cab, with a 3.0L
* have a vacuum diagram for this truck? The original one on the truck appears to have faded away. It's basically a blank white sticker now.
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aewing
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Apr 26, 2019 09:22 AM
