egr removal

[puty72]

how do i safely remove my egr system from my 89 ranger 2.9

 

[Wicked_Sludge]

CLICK

 

[puty72]

alright thanks i was just wondering cuz i wanted to do away with some of the hoses and shit under the hood if possible

 

[Psychopete]

alright thanks i was just wondering cuz i wanted to do away with some of the hoses and shit under the hood if possible

Are you sure that's an EGR system you're looking at?

As far as I knew, only 2.9L Rangers w/ EGR were 86-87 models. But I guess it is possible that someone might have swapped an older engine w/ EGR system and computer.

To do it right all of the EGR stuff will need removed and the holes will need plugged. The later model intakes had a block-off plate for the upper intake, the exhaust manifold can be blocked with just a bolt. Exhaust will need plugged where EGR tube was. Vacuum should be simple enough.

The key here is that the computer needs to be upgraded to an 88+, since it will not have the provision for EGR and knock sensor. On my computer swap, I got the diagrams for both computers and spent a few hours mapping out the differences in the 60 pin computer harness. Natedog has done a similar conversion, search around for some of his posts.

If you were REALLY thinking about even attempting that, I would recommend that you go with a Califorina Emissions '90 MAF computer which did not have the provision for EGR, but DID have provision for MAF. That's another vacuum line gone to the MAP sensor, but it needs to stay plugged in electrically.

Pete

 

[CraigK]

Just a quick question. The EGR valve control the timing and amount of exhaust gas recycled into the intake manifold. (Right?) This is based on what inputs? Mostly O2? What does the IAC do, and based on what inputs? Thanks.

BTW, I have my EGR removed and plugged at both ends. No change of computer. Mileage is poor (16-17 mpg average), but has been for many years.

CraigRK

 

[MAKG]

It doesn't affect timing (directly). Only exhaust gas. It does this based upon manifold vacuum and perhaps throttle position. It's off at idle and full throttle.

It's both silly and illegal to disable EGR. The fines are hefty. It might cause poor mileage if the engine detonates, or else you have another problem you'll just have to diagnose. You won't HEAR the detonation on a working 1987 because it has a knock sensor and the PCM will just retard the timing for you, leading to poor performance.