Hey,
'88 XJ Cherokee Laredo 4.0L Auto.
I had a reman 4.0L put in around 5 yrs ago and put only 5k miles on it since I'm still rebuilding her in spare time. They used the old Manifold on new Longblock.
I also had a short K/N air filter put on and I think the Mech forgot to hook up my EGR (new at time also) by connecting the vacuum line to the EGR Solenoid (new too).
So, for the past 3 yrs I've been passing Emissions in NY w/o the EGR hooked up. And when I discovered it not hooked up I then reconnected it. Now, it fails Emissions testing for two years but "Benjamin" helped pass me. LOL
I would like it to pass legally though.
Here's my set-up: High-flow Cat and Flowmaster Muffler, Dual Electric Fans, all else stock. Cat has since been replaced with another High-flow Cat. The Muffler Shop said it was still good (I wanted to rule that out so I chged it)
My Temp Guage is a shade past 210 deg. One test failed when the vehicle overheated a year later it borderline passed (Nox passing is less than 2.50 mine was 2.49 all other readings lower) but it was borderline overheating (almost in the Red area on Temp Guage).
So I had enough of the Closed Radiator System and Installed New 3-Core All Metal CSF Radiator and Overflow Bottle, Changed Thermostat (Mopar 195 deg) all hoses and clamps too. Runs much cooler now even idling. Do you think upgrading this Cooling System would be enough to make it pass now?
btw - the Emissions Testing Shop uses no Big Fan in front of the vehicle.
What could be causing me to fail the Emissions test (High NOX)?
Thx, Phil
'88 XJ Cherokee Laredo 4.0L Auto.
I had a reman 4.0L put in around 5 yrs ago and put only 5k miles on it since I'm still rebuilding her in spare time. They used the old Manifold on new Longblock.
I also had a short K/N air filter put on and I think the Mech forgot to hook up my EGR (new at time also) by connecting the vacuum line to the EGR Solenoid (new too).
So, for the past 3 yrs I've been passing Emissions in NY w/o the EGR hooked up. And when I discovered it not hooked up I then reconnected it. Now, it fails Emissions testing for two years but "Benjamin" helped pass me. LOL
I would like it to pass legally though.
Here's my set-up: High-flow Cat and Flowmaster Muffler, Dual Electric Fans, all else stock. Cat has since been replaced with another High-flow Cat. The Muffler Shop said it was still good (I wanted to rule that out so I chged it)
My Temp Guage is a shade past 210 deg. One test failed when the vehicle overheated a year later it borderline passed (Nox passing is less than 2.50 mine was 2.49 all other readings lower) but it was borderline overheating (almost in the Red area on Temp Guage).
So I had enough of the Closed Radiator System and Installed New 3-Core All Metal CSF Radiator and Overflow Bottle, Changed Thermostat (Mopar 195 deg) all hoses and clamps too. Runs much cooler now even idling. Do you think upgrading this Cooling System would be enough to make it pass now?
btw - the Emissions Testing Shop uses no Big Fan in front of the vehicle.
What could be causing me to fail the Emissions test (High NOX)?
Thx, Phil