E-check...Yay!!!

[Mercmarquis]

I thought I was done with this but I guess this will be the last time I get checked. But i still got the nice lil reminder in the mail yesterday. So I have to find a way to run an EGR with a 4bbl and get my cats back on. I dont know if I'm gonna pass with the cam, but I dont think it will effect it much.

So heres my idea, either pickup a used 2bbl manifold and try to run it with a 2bbl and an old style egr. Or I can try to get a manifold for egr with a 4bbl and get the egr plate to go with it.

I still have 2 brand new cats from the old dual exhaust I had on before. I have a welder now so I can do all of it myself. What I will do is leave the headers on the car and buy flanges for a 2.5in exhaust and get a reducer and weld it to the cat down pipes so they will bolt up to the headers. I will get the impy 2.5in tail pipes to finish the exhaust and just use reducers to get the cats to fit up to it. Then after I get it checked, I will take off the cats and down pipes and put my off road h pipe back on, then weld them to the impy tails and I will have a finished exhaust after its all done.

If anyone else has any tips for me, I'd like to hear it.


Thanks

[mrltd]

Older fords had the 4bbl egr stock....We put a 4bbl egr setu pon our 79 versailles when we built it up.

[TommyN]

My stang passed with 2 cats, a stock 85 Mustang 4bbl carb, and dry gas.

Tom

[Mercmarquis]

My stang passed with 2 cats, a stock 85 Mustang 4bbl carb, and dry gas.

Tom

I remember you mentioned it, but with no EGR? How high were your NOX levels?

[Southern_Pride]

I have a 4 barrel egr plate in the shed. Might be spreadbore. 10 bux you can have it.

[TommyN]

We have a test that runs the car on rollers to 25mph. The test is only in the counties surrounding our city. The rest of the state no longer has to be tested.

I was hoping it would go smoothly, but unfortunately it had too high CO levels. I was running the same setup I did when it passed 2 years ago, a catted H pipe and a factory Ford Motorcraft/Holley that I jetted down from 62 to 60 on the primaries.

This time it was way over on CO, 3.47% with a max of 1.12%.

I added some bottles of dry gas (48 oz methanol) to the tank approximately 5 gallons and it was 2.66% CO of max 1.12 the second test.

This was frustrating, as it had passed OK 2 years ago.

I pulled the primary side of the carb apart. I figured it was running rich due to something not right in the carb. The OEM carb had been rebuilt by the previous owner with a cheaper rebuild kit with an off-brand power valve. I had drained the gas from it 2 years ago, but for some reason the O-rings under the power valve(surprised it was not a gasket) and the O-rings at the accelerator pump transfer tube were messed up.

I did the following to it. Pulled the power valve and replaced it with a plug reasoning that the car would not be under load so it would not need the power valve. I lowered the float level a bit (it was pretty low to begin with) and put in the next smaller set of jets I had (592) , which were almost the same as what I had been running. I put more dry gas in the tank, about 96oz more to the approximately 3 gallons of gas left from the previous day which I believe comes 10% oxygenated right from the pump to begin with. These are the results of the final test:

*********observed******standard

HC(PPM) 30.3 174.0
CO(%) 0.01 1.12
NO(PPM) 161.5 1285.0
CO2(%) 14.11 NONE

Not sure which of the repairs fixed the problem, but I was happy to see the low numbers.