Have you looked at a data log from the link? Maybe that will give some clues on what the ECU thinks is going on? On Jul 13, 2012 11:39 AM, "Eric McCord" <[email protected]> wrote:
> Swapped out both the ignition switch and CAS. No change. I have only used > the Link. I also swapped out the fuel pump before purchasing a fuel > pressure guage. I am getting 40 psi at the rail at all times with the key > on. It is not looking like it is fuel related. > > Eric > > On Fri, Jul 13, 2012 at 2:35 PM, [email protected] <[email protected]>wrote: > >> A long shot here, but it may be that the ignition switch is faulty, >> allowing to to start the car and then losing electrical contact, or perhaps >> the current from the ignition to the CAS has been interrupted. WAIT! You >> are using the Link now, but did you EVER use another method of engine >> management? Did you use an MSD? I recall long ago having a problem >> develop after I upgraded from the Bell Sys II to full FM II spec with link, >> and it turned out that old wiring for the MSD unit had developed a short >> (or some problem... was years ago!) >> >> LGO >> >> >> >> -----Original Message----- >> From: Eric McCord <[email protected]> >> To: Mark Phillips <[email protected]> >> Cc: miatapower <[email protected]> >> Sent: Fri, Jul 13, 2012 11:54 am >> Subject: Re: '91 fires, won't stay on... >> >> No luck. I just replaced that transistor and it is still doing the same >> thing. >> >> Eric >> >> On Fri, Jul 13, 2012 at 10:41 AM, Eric McCord <[email protected]>wrote: >> >>> I am off to the Shack. >>> >>> Eric >>> >>> >>> On Fri, Jul 13, 2012 at 10:39 AM, Mark Phillips < >>> [email protected]> wrote: >>> >>>> Yes. >>>> >>>> >>>> On 07/13/2012 10:28 AM, Eric McCord wrote: >>>> >>>> on yours it was T2? Did you just replace the transistor to get it back >>>> up and running? >>>> >>>> Eric >>>> >>>> On Fri, Jul 13, 2012 at 10:25 AM, Mark Phillips < >>>> [email protected]> wrote: >>>> >>>>> The relay has 12 volts applied to one side of the coil with the >>>>> ignition on. When you jump F/P to GND you are taking the other side of the >>>>> relay coil straight to ground bypassing the transistor. Normally the >>>>> transistor performs this grounding function (sinking current). T2 also >>>>> interacts with other circuity in the MAF box. >>>>> >>>>> This happened to me about 4-5 years ago on my '92. >>>>> >>>>> Mark >>>>> >>>>> >>>>> On 07/13/2012 10:00 AM, Eric McCord wrote: >>>>> >>>>> When I jump out the F/P to GND the pump stays on but I still have the >>>>> same symptoms. If that transistor drives the relay but I jump it out >>>>> should >>>>> that not run? >>>>> >>>>> Eric >>>>> >>>>> On Fri, Jul 13, 2012 at 9:54 AM, Mark Phillips < >>>>> [email protected]> wrote: >>>>> >>>>>> Hi Eric, >>>>>> >>>>>> I sent this out earlier but didn't see it repost. I apologize if its >>>>>> a repeat. >>>>>> >>>>>> There is a transistor in the Link box that replaces the AFM; it >>>>>> drives the fuel pump relay. It is an NPN transistor, is marked "T2" and >>>>>> may >>>>>> have failed. About $1.50 and a soldering iron to replace. >>>>>> >>>>>> Mark Phillips >>>>>> >>>>>> >>>>>> On 07/13/2012 09:40 AM, Eric McCord wrote: >>>>>> >>>>>> I just swapped out the CAS and same symptoms. If it's a bad MAF box >>>>>> where can I get one of those? Since my Baja went down the Miata has been >>>>>> my >>>>>> only transportation and Kaitlyn and I are leaving in a week and a half >>>>>> for >>>>>> the dragon and our road trip. >>>>>> >>>>>> Eric >>>>>> >>>>>> On Fri, Jul 13, 2012 at 9:18 AM, Ray <[email protected]> wrote: >>>>>> >>>>>>> Can also be that one of the two signals from the CAS is not there. >>>>>>> >>>>>>> *From:* Eric McCord <[email protected]> >>>>>>> *Sent:* Thursday, July 12, 2012 6:21 PM >>>>>>> *To:* [email protected] <[email protected]> >>>>>>> *Cc:* [email protected] >>>>>>> *Subject:* Re: '91 fires, won't stay on... >>>>>>> >>>>>>> Just checked that connector. It looked fine, I reseated it and >>>>>>> still have the same symptoms. >>>>>>> >>>>>>> Eric >>>>>>> >>>>>>> On Thu, Jul 12, 2012 at 9:07 PM, [email protected] < >>>>>>> [email protected]> wrote: >>>>>>> >>>>>>>> Have you checked the manifold pressure connection (heck! I think >>>>>>>> that's what its called - I can't remember!) ? If it comes loose, it >>>>>>>> may >>>>>>>> begin to fire and then die. On mine its the small box with the >>>>>>>> AFM-like >>>>>>>> connector (multi-pin) on the driver's side. >>>>>>>> >>>>>>>> LGO >>>>>>>> >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> Miatapower mailing list >>>>>>>> [email protected] >>>>>>>> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >>>>>>>> >>>>>>>> >>>>>>> ------------------------------ >>>>>>> _______________________________________________ >>>>>>> Miatapower mailing list >>>>>>> [email protected] >>>>>>> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> Miatapower mailing >>>>>> [email protected]http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> Miatapower mailing list >>>>>> [email protected] >>>>>> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>> >>>> >>>> >>> >> _______________________________________________ >> Miatapower mailing >> [email protected]http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >> >> > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > >
_______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
