How does the scope determine if it's running rich? Does it monitor the A/F
ratio?
Wouldn't not burning all the fuel cause the same symtoms as running too rich?
Are all your cyclinders fireing properly? I assume you don't run 150octane
gas.
Jay W
Gregg Grisham wrote:
> Hello everybody, I have been kinda off and on here, and I feel guilty that
> lately I only come back when I have a problem. Well here it is.
>
> It is a 99 dak 2wd, 5spd 5.2
> Mods, K&N GenII, Centerforce clutch, 52mm tb, MPI intake, Mopar headers,
> Mbrp cat back, catco cat, Hurst shifter, Hotchkis susp, and thats about it
>
> I installed the MPI in November, I had a new cat put on in October, and
> the truck was running good through december. towards the beginning of Jan,
> I was smelling rotten eggs, and the truck felt sluggish, I recently
> replaced the o2 sensor, then took the truck in for service. they replaced
> the cat with annother catco, replaced the tstat with a stock temp unit
> (had a 180) changed the oil, resealed the manifold(it was leaking out the
> back)
>
> Now the truck smells twice as bad, and it occasionally "boggs" and
> stutters, on accelertation. they had it on a scope and said it is not
> running rich, however it smells like it is. the other symptom is that upon
> coming to a stop, the idle drops to about 400, then bounces back to 600
> once the truck is stopped.
>
> What could be causing this? do I need an computer reprogram? annother
> sensor? HELP!!!! this truck has 63,000 on it now, and I put about 500 a
> week on it.
>
> I know there will be somebody here who can help, there always is.
> Thanks
> Gregg
> http://community.webshots.com/album/14188865ntnFYccyHF
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