Ecu Voltage.....this makes me sick
09-01-04, 02:51 PM
#27
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Hailers, another interesting thing I noted on the ref voltage was that is was exactly the same whether batt voltage (key on) or alt voltage (eng running) was at the ECU, which leads me to believe that the ECU has an internal voltage regulator, instead of just a step-down resistor package, to produce that ref voltage. Next question is how low the batt input voltage can go before that ref voltage starts dropping...
87RX- that should be a good meter for ya, although for changing voltages (such as TPS, boost sensor, AFM, etc) while driving, I prefer an analog because it provides a much better visual presentation of what's going on compared to a bunch of digits flashing by every second...But for static checks (key on, idle) the digital should be fine...
If your ref voltage is good, and your TPS circuit (wiring) is good, you should be able to nail that 1 volt by adjustments. Take a look at the male & female spade terminals in your TPS connector out on the engine- they tend to get corroded, which can really mess with your signal...
O2 sensor won't read right until she's fully warm. At that point, cruising down the freeway, the meter should be bouncing back & forth between .4 and .5 volts (closed loop operation)
I've always found it easier to read the boost sensor while driving, instead of the BS that Mazda wants you to do with the vac hose off. It too should show a nice linear voltage change with moderate acceleration...
It's still possible you've got harness problems, but check those problem sensors again just to make sure...
87RX- that should be a good meter for ya, although for changing voltages (such as TPS, boost sensor, AFM, etc) while driving, I prefer an analog because it provides a much better visual presentation of what's going on compared to a bunch of digits flashing by every second...But for static checks (key on, idle) the digital should be fine...
If your ref voltage is good, and your TPS circuit (wiring) is good, you should be able to nail that 1 volt by adjustments. Take a look at the male & female spade terminals in your TPS connector out on the engine- they tend to get corroded, which can really mess with your signal...
O2 sensor won't read right until she's fully warm. At that point, cruising down the freeway, the meter should be bouncing back & forth between .4 and .5 volts (closed loop operation)
I've always found it easier to read the boost sensor while driving, instead of the BS that Mazda wants you to do with the vac hose off. It too should show a nice linear voltage change with moderate acceleration...
It's still possible you've got harness problems, but check those problem sensors again just to make sure...
09-04-04, 08:40 AM
#28
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I have been working for the past few days so the car sensor testing has had to wait...
I did take the car to the dealer (oh no) for a compression test we hooked it up and turned it over on the front.....it had like a 7 an 8 and a 0... so this looks REALLY bad.
Switched it over to the back, tested... 25.5,25.5,25.5... he looks at it and says "WTF?" the highest its supposed to hit is like a 9 or 10.
Tried the front again.. this time 0,0,0 ... then the back 0,0,0....
My car broke the compression tester so no they have to send it to get fixed and I'll rebook my appointment next week...
If the a seal in the front rotor is gone dosent that mean I would see a (#,0,0) or is it possible to get a (#,#,0)?
If the car still works Im going to keep "tweaking" with it but if a seal is gone I'm going to sell it... I've already put about 6g into the car, and with the new motor only having about 6-7k on it (I kept overestimating) I dont think I have the money to go out and buy another reman...
I did take the car to the dealer (oh no) for a compression test we hooked it up and turned it over on the front.....it had like a 7 an 8 and a 0... so this looks REALLY bad.
Switched it over to the back, tested... 25.5,25.5,25.5... he looks at it and says "WTF?" the highest its supposed to hit is like a 9 or 10.
Tried the front again.. this time 0,0,0 ... then the back 0,0,0....
My car broke the compression tester so no they have to send it to get fixed and I'll rebook my appointment next week...
If the a seal in the front rotor is gone dosent that mean I would see a (#,0,0) or is it possible to get a (#,#,0)?
If the car still works Im going to keep "tweaking" with it but if a seal is gone I'm going to sell it... I've already put about 6g into the car, and with the new motor only having about 6-7k on it (I kept overestimating) I dont think I have the money to go out and buy another reman...
09-04-04, 09:22 AM
#30
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if i've driven it around on the rear rotor (thinking the front was working)
and the car was running lean (front primary not working)... it might be a possibility..
and this guy was worked on 7's since the 70's... hes not a bad guy, I think he knows what hes doing
and the car was running lean (front primary not working)... it might be a possibility..
and this guy was worked on 7's since the 70's... hes not a bad guy, I think he knows what hes doing
09-04-04, 09:28 AM
#31
Very true if you where running on one rotor. I was doing some searches a while back and came to this one post where this guy said his car was running like crap and then one day it ran like the best it has ever driven and the next thing he knew his engine was poped. He said that if your engine does that then it's usually a pretty good sighn of it going. Don't know if that pertains to you but I remember when you said it was working better than ever so that kind of reminded me of that thread. So this rotary mechanic has never seen it do this before??? Strange **** man!
09-04-04, 11:20 AM
#32
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87RX7- do have oil coming out of the plug holes or anything weird like that?
#,#,0 would be a side seal...
Break that sucker down and rebuild yourself! Heck the guys on this forum could walk you through it step-by-step if you need help; then we could get another 30-something page thread going like Gnomes, lol
#,#,0 would be a side seal...
Break that sucker down and rebuild yourself! Heck the guys on this forum could walk you through it step-by-step if you need help; then we could get another 30-something page thread going like Gnomes, lol
09-04-04, 04:23 PM
#33
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me rebuilding it wouldnt be the problem... comming up with 1000 bucks for the kit would be...
And im sure you guys would be there to help!
Could I rebuild, just replacing the side seal? (i dont want new apex's if I dont need them)
And im sure you guys would be there to help!
Could I rebuild, just replacing the side seal? (i dont want new apex's if I dont need them)
09-05-04, 08:21 PM
#35
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Supposedly you can if the apex seals meet the specs in the fsm. The FSM suggests putting the apex seals back exactly where they came from. Personally there ain't no way I'd do it that way. Life and mechanical thiings, just don't work like that in my opinion. Hey, you wanted an opinion.
09-05-04, 08:42 PM
#38
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What the heck is that? Is that a group hug thingy? Man, the "if it feels good, do it" liberals really are taking over, lol...
87RX-I think Hailers pretty well summed it up for you...If you're gonna tear her down, do it right the first time...
87RX-I think Hailers pretty well summed it up for you...If you're gonna tear her down, do it right the first time...
09-05-04, 08:46 PM
#39
Banned. I got OWNED!!!
Originally Posted by WAYNE88N/A
What the heck is that? Is that a group hug thingy? Man, the "if it feels good, do it" liberals really are taking over, lol...
87RX-I think Hailers pretty well summed it up for you...If you're gonna tear her down, do it right the first time...
87RX-I think Hailers pretty well summed it up for you...If you're gonna tear her down, do it right the first time...
.
09-05-04, 08:56 PM
#41
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"do it right the first time"
I just got a new engine though.... Its my own stupid fault if its gone...
But I guess if HAILERS says so!
Tuesday = compression test...
Wednesday= back to testing ECU voltages.
I just got a new engine though.... Its my own stupid fault if its gone...
But I guess if HAILERS says so!
Tuesday = compression test...
Wednesday= back to testing ECU voltages.
09-05-04, 08:59 PM
#43
Banned. I got OWNED!!!
Originally Posted by hondahater
hehe, thats the best part about this site!
09-05-04, 09:12 PM
#45
Banned. I got OWNED!!!
Originally Posted by hondahater
no matter what I want to do all I have to do is look it up and 9.5 times out of 10 it will be there. The knowlege that is in this site is crazy! Anything I don't know I just ask wayne lol.
lol.
09-05-04, 09:16 PM
#46
lol there should be a pop up that comes up everytime you enter the site (if you have less than 100 posts) that reads "search newb search" or something to that affect. I think people view it as home work (most people hate homework) and just make there own thread instead.
09-05-04, 09:19 PM
#47
Banned. I got OWNED!!!
Yeah. I've been damn tempted to make a thread without searching first. I have a few times done it and regretted it. Honestly though, it's just easier to do a search. You'll (most likely) get information: quicker, easier, and more detailed. But... whatever floats peoples boats.
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