You really need to find out exactly what you've got for engine management. I have a feeling that is the root of the high engine mortality rate. The JRSC came with various fuel and ignition solutions over the years... and several of the solutions really sucked. Depending on the year of the car, the ECU is at the passenger's feet under the carpet (1.6 cars) or behind the passenger seat (1.8 cars through 97). Look for any additional "black boxes" wired in at the ECU, or any wire splices. Under the hood, look for an AFPR (looks like a flying saucer with 2 fuel lines running from it), or maybe a rectangular box that says "MSD".
I'm betting that the factory ECU is fine, but that the fuel/timing solutions are not... or that your fuel pump is tired and not making the required fuel pressure to keep things rich and happy. -chuck pm wrote: > > > On Thu, Sep 11, 2008 at 8:28 AM, Chuck Wills <[EMAIL PROTECTED] > <mailto:[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] <mailto:[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
