I just took my car for an etest yesterday and passed everything but the HC at idle. I was nowhere near passing it there.
My results were:
40km/h
HC - limit 57 reading 57
CO - limit 0.32 reading 0.00
NO - limit 0421 reading 93
idle
HC - limit 200 reading 880
CO - limit 1 reading 0.34
I read elsewhere that high HC with low CO could mean misfire or vacuum leaks.
So it looks as though I need to check for some vacuum leaks, as a couple weeks ago I did plugs/wires/cap/rotor/coil before I pulled it out of storage.
It seems to be running smooth. I pulled some codes from it yesterday and I came up with:
172 - HEGO HO2S sensor fault/lean bank 1
334 - EGR closed valve voltage high
33 - EGR valve not opening properly
From these I talked to an old neighbour who is a Ford tech and he said the EGR position sensor is fairly common on these.
I figure they're fairly cheap so I may as well just do it. The other thing I was going to do what to do both 02's because they do look pretty old if I remember right. I'm going to clean the air filter/MAF sensor/IAC valve and whatever else I can think of and try again. I also read that I should only be running 87 in it unless I need 91 as 91 will burn slower, raising HC? I'll list the mods on my car but I guess there is likely nothing there that needs 91. I do have a different cam in it tho, so do I have any choice but to have it tuned?
1994 Mustang GT
Cobra upper/lower intake
GT40X heads
1.7 rockers
B303 Cam
65mm TB
BBK CAI
March Underdrive Pulleys
Mac equal length shortys
Bassani x-pipe
Borla SVO side exhaust
Sorry for the long post... but I really need this car to pass, I'm soon going to run out of temporary permits! Any help is greatly appreciated!
My results were:
40km/h
HC - limit 57 reading 57
CO - limit 0.32 reading 0.00
NO - limit 0421 reading 93
idle
HC - limit 200 reading 880
CO - limit 1 reading 0.34
I read elsewhere that high HC with low CO could mean misfire or vacuum leaks.
So it looks as though I need to check for some vacuum leaks, as a couple weeks ago I did plugs/wires/cap/rotor/coil before I pulled it out of storage.
It seems to be running smooth. I pulled some codes from it yesterday and I came up with:
172 - HEGO HO2S sensor fault/lean bank 1
334 - EGR closed valve voltage high
33 - EGR valve not opening properly
From these I talked to an old neighbour who is a Ford tech and he said the EGR position sensor is fairly common on these.
I figure they're fairly cheap so I may as well just do it. The other thing I was going to do what to do both 02's because they do look pretty old if I remember right. I'm going to clean the air filter/MAF sensor/IAC valve and whatever else I can think of and try again. I also read that I should only be running 87 in it unless I need 91 as 91 will burn slower, raising HC? I'll list the mods on my car but I guess there is likely nothing there that needs 91. I do have a different cam in it tho, so do I have any choice but to have it tuned?
1994 Mustang GT
Cobra upper/lower intake
GT40X heads
1.7 rockers
B303 Cam
65mm TB
BBK CAI
March Underdrive Pulleys
Mac equal length shortys
Bassani x-pipe
Borla SVO side exhaust
Sorry for the long post... but I really need this car to pass, I'm soon going to run out of temporary permits! Any help is greatly appreciated!