HO EFI and deleting stuff. | Ford Escort Owners Association (FEOA)
  1. Wash your hands and do not touch your face, keep it safe and clean. Long live Feoa!

HO EFI and deleting stuff.

Discussion in '1st Gen 1981-1990 CVH' started by austin86, Jul 10, 2020.

  1. austin86

    austin86 That nut who spends way to much on a escort.

    Messages:
    890
    Likes Received:
    299
    Trophy Points:
    78
    Location:
    Ohio
    So after dealing with the wording on my EXP I started to realize it wasn't such a big deal to work with. And while I would really love to put carbs on the car, I do have everything for the HO efi.
    But I don't want the EGR or smog pump on the car. I'll be keeping a cat, a more modern better one.
    My question is, would the car still run right without them or will the ECU need reprogrammed. Bear in mind I intend to put something like a MSD on the car.

    What about the xr4ti ECU, would it have problems without the EGR it smog pump?
    ricksgt and nicholasalipaz like this.
  2. UnexplodedCow

    UnexplodedCow FEOA Member

    Messages:
    7,038
    Likes Received:
    177
    Trophy Points:
    363
    Location:
    Central Ohio
    While the engines can run without EGR, the ECU will pull timing since the engines wind up running a bit hotter without the exhaust gases recirculating. Emissions will increase, too, and work the catalytic converter a bit harder, though these engines aren't terrible with emissions.
    The smog pump is isolated the EGR and doesn't do anything other than inject oxygen into the mix to help the catalyst. With a newer design of cat, that's a non-issue.

    I'd suggest using the EGR if you're wanting an OE-style setup. If not, no big deal, but the ECU will retard the timing a big more than normal, so it won't help power. That's been my experience, anyway.
    austin86 likes this.
  3. austin86

    austin86 That nut who spends way to much on a escort.

    Messages:
    890
    Likes Received:
    299
    Trophy Points:
    78
    Location:
    Ohio
    Could I make up for the timing lost by adjusting base timing? I do plan to put a msd system on the car so I can assuming that a timing retard wouldn’t matter?
    Last edited: Jul 14, 2020
  4. UnexplodedCow

    UnexplodedCow FEOA Member

    Messages:
    7,038
    Likes Received:
    177
    Trophy Points:
    363
    Location:
    Central Ohio
    Base timing can still be 10 BTDC, but the ECU will compensate accordingly. It has a wide range of adjustment.
    austin86 likes this.
  5. austin86

    austin86 That nut who spends way to much on a escort.

    Messages:
    890
    Likes Received:
    299
    Trophy Points:
    78
    Location:
    Ohio
    That is what I thought. I know on my CFI motor taking the EGR out and installing the stock header with a timing readjust didn't hurt anything performance wise, but adding the ligher header could have nulled out the loss of timing. The HO motor not being the same I thought Id ask. That and I kinda forgot about removing the egr on that morot... ops my bad.
    Last edited: Jul 14, 2020
  6. UnexplodedCow

    UnexplodedCow FEOA Member

    Messages:
    7,038
    Likes Received:
    177
    Trophy Points:
    363
    Location:
    Central Ohio
    I put an HO header on my CFI and connected the EGR by using some soft-walled copper pipe and some fittings to make it line up properly. In seven years, it never gave me a problem, and timing was able to be advanced just a little more than without (I tried with disconnecting vacuum to the EGR valve).

Share This Page