Welcome to the Forum!

 

Welcome to the Forum @lrollins

AFIK, 1987-1990 YJs with a 6 cylinder engine never had a CEL.
However, since the Howell FI setup is CARB approved (CARB is the emission authority in California) , the CEL in your Jeep may be part of the Howell setup. I'd contact Howell for confirmation and advice.

My 1987 six cylinder didn't/doesn't flash a CEL at any time. I don't know where to locate any information on this. I don't know if a dealer can give you any documentation or if you have to go to an emission referee (or whatever that position is called in your state).

Good Luck, L.M.

 

Welcome to the forum!

Somebody on here recently installed a Howell for California and was having a different no start issue, but I seem to recall him saying they included a Check Engine Light for him to wire in. Maybe a phone call to Howell on Monday will get you straightened out.

 

I apologize for any confusion...

I do have a Check Engine Light that is wired into the Howell electronics and it does light up. I have seen it once or twice over the last year or two and just had to turn the engine off/on to clear it. It also flashes a few times when the engine is shut off.

The smog tech said that it is normal to see it flash when the engine is turned off but it should also light up when you turn the ignition to "on" and remain lit until the engine starts. I was hoping to hear from someone with a Howell FI in a YJ to confirm this happens or not.

Thank you to everyone who has responded!

 

I did a Howell TBI system on a 305 SBC running a 7747 ECM and later on an EBL Flash 2. Key on illuminates the SES to check the bulb. I still have the service manual and on page 10/11 it has trouble shooting Chart A1 "service engine soon" light diagnostics. Also verifies that the light is on with key.

 

Thank you Cornchip! I really appreciate the confirmation and the guidance.

 

Scans.

page 10

page 11

 

I have a small round blue light near the ignition that appears to be after market. My 89 YJ has the Howell EFI kit on it. Does anyone know if this light is the check engine light? I know it could be anything if it’s aftermarket, but haven’t seen a picture of the Howell EFI light to compare it to.

 

From what I understand, Howell has good customer support. I'd contact their customer support hotline and ask.
Does the Howell setup have a diagnostic port? If so, do you have a code reader.

Good Luck, L.M.

 

Thanks! It has an ALDL port but I believe it’s OBD I and all of my readers are OBD II.