On Thu, Sep 11, 2008 at 8:28 AM, Chuck Wills <[EMAIL PROTECTED]> wrote:
> Peter- > It sounds like either not enough fuel or too much ignition advance. i didnt know adj would be bad...well maybe now that I think about it... > You definitely need to get this sorted out. > What engine management do you have on the car? honestly I dont know exactly, i got the car at 26K with the blower in it. the car burned a valve at ~90k and started to smoke ~ 110k, the start of expenive rebuild lessons at 112K. Therefore I expect that the ECU was (is??) good. > > Does it have something to increase fuel and retard timing? i am guessing the ECU is the bigger box under the pass. seat, right? I am going to look up the ECU now. thanks, peter > > > -Chuck > > > pm wrote: > >> hi, >> >> Quick review, 95 M-Ed. JR/SC and motor bored 10 over all rebuilt <2k miles >> ago. Note I did not build the reciprocating mass >> Since some sort of rodent had nested in the intake of the replacement >> block/head i have and some of the intake valves were open, i decided it was >> best to pull the head and ensure that the cylinders were devoid of debris. >> further, as long as the "new" head was coming off, i decided to re-use the >> rebuild head from the "old" motor. upon ,removing the "old" head, i >> inspected the the "old" pistons and cylinders. I am far from a mechanic as >> i learn by going things in a roat (sp?) manner, (note the oil pump :). so >> this is getting into areas I do not know well. However, I saw lines along >> the vertical of the cylinders which seemed OK, but the walls feel like there >> are many small angles rather than beening perfectly round. Moving forward, I >> see he cut outs for the intake valves looked odd but pretty much the >> same...then i noticed what looked like impact damage on one piston. >> looking more closely, the intake cutouts were indeed burned out sections of >> all the pistons such that I can see the top ring, (the oil sealing ring, >> right?)!!! (SideBar: that is why I could not determine why I was having >> difficulty doing a leak down test, i could hear hissing but could not >> isolate where the air was escaping from without a proper listening device). >> Something new I learned. >> >> Determining cause of failure like this is where I an greatly deficient in >> knowledge. I believe burning the pistons is due to a lean condition, but I >> do not know why the AF mix was lean...isn't that taken care of via the ECU?, >> If so, how can I determine if mine is functioning correctly? If not how do >> i set the mix correctly? >> I hope to get a real mechanic over to inspect/advise me later today.... >> >> sigh, >> >> peter >> >> >> >> -- >> Medio tutissmus ibis >> You will go most safely by the middle course >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Miatapower mailing list >> [email protected] >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >> > > -- Medio tutissmus ibis You will go most safely by the middle course
_______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
