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i was assuming the measurements were happening without the injectors in place, measuring at the connectors themselves.
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Originally Posted by Braineack
(Post 1489363)
IF the MS was wired to do so...
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Originally Posted by Braineack
(Post 1489370)
those injectors should be 12ohm :P
and i was assuming the measurements were happening without the injectors in place. We on the same page now? |
Originally Posted by Ted75zcar
(Post 1489371)
This is the only way I know of for the MS to control the FP on an early NA without chassis harness modifications. If there are no harness modifications, and the MS isn't configured to control the FP via 1C, and the AFM has been removed, You're gunna have a bad time.
i wire FP to 2O and if you remove the AFM, you simply jump the 2O pin to the FPR pin in the AFM connector to connect the MS to FPR directly. |
Originally Posted by Ted75zcar
(Post 1489372)
I typically use 15 ohms, 15 15 = 7.5.
We on the same page now? |
Originally Posted by Braineack
(Post 1489377)
i dont ever wire my MSes this way. ever. it's dumb.
https://cimg7.ibsrv.net/gimg/www.mia...6695bfadd9.png |
Originally Posted by Braineack
(Post 1489381)
yes. still same conclusion: something is wrong on ground side of things -- especially since he measured 14ohms on all 4 injectors.
Yes, I agree, there is something wrong on the ground side of things here. |
Hello again,
I was away travelling for work, so thank you both for the very informative discussion. I think my block of texts and a bit unreadable formatting of the said blocks were a bit confusing :D To clarify : 2u and 2v voltage to the ground is measure with the injectors (at least one injector but measured in both scenarios anyhow). With the injectors unplugged, I read zero voltage in the working bank but same voltage in the problem bank 1- Most obvious observation, (that was very noob of me to not do the first time because I was measuring voltage across terminals with all inj unplugged - not to the ground.) Anyhow: Yellow/black - both injectors unplugged, KOEO-, still has the same -1v battery voltage to the ground. ---- I mean battery voltage value minus one volts (i.e. 10v etc.) basically, there is voltage despite no resistors. Yellow wire, good bank, does not read any voltage when both injectors are unplugged . (which I think is the correct behavior) Only one injector of each bank plugged: firing bank reads same as battery (I was boosting the battery last time) - shitty bank reads -1v battery. --Basically, without any resistors on the line, it still reads voltage to the ground. At this point I am trying to get the local specialist to change u7 mosfet and will try again to see if that solved the issue. Hopefully it is a bit clear now. Regarding fuel pump, STSIGN is removed. I will check 1C for the pump, when I put ms in the car again. |
do the same test with the MS unplugged. that will rule out if its a short in the MS or car's wiring.
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Originally Posted by Braineack
(Post 1490085)
do the same test with the MS unplugged. that will rule out if its a short in the MS or car's wiring.
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yeah, and just see if you still read voltage on the injector ground side.
if you then plug in the MS and do the same test exactly the same, and you do read voltage on the ground side, at least we know we've narrowed it down to being a problem with the MS (which we probably already know at this point). Next step would be opening the case and getting good pictures inside the top and bottom of the board and the microsquit module. |
1 Attachment(s)
Ok guys, first of all thanks to both of you for your support. We have a resolution (at least regarding this problem :) )
Spoiler
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Hello again,
Just to get closure on the issue: I checked at the shop, now the voltage problem have switched over to the working bank. But instead of 1v below positive wire, it showed 5+ volts. Furthermore, when you check the trigger wire without the injecotrs connected, this bank now shows some milivolts. Funny enough, new mosfet acts exactly as it should. Regardless: Injector got stuck open, flooded, bent rods (as far as we know for the moment). Funny enough, all the cylinders are flooded. And even by checking with a stick, 2 and 4 are 2-3 mm lower than 1 at their TDC. Anyhow, decided to hibernate the car while sorting new parts since opening up everything is pointless at this point, as I cannot get anything from US within a month minimum and then some. Thanks all for your inputs. I will not open the engine until I get some new rods, new injectors (probably the ev14 pnp kit) and be sure that MS is sorted out. At that point, if the pistons are f*ed up, than go for lower comp pistons. Ps. I "felt" that I should have gotten both mosfets changed but anyhow, the guy was also a hobbyist so can't blame anyone but myself. After a lot of abuse with emanage and 200+ crank hp with good fuel for 20.000 km's, I managed to kill the engine in the most unexpected way :D Any advice on setup, MS etc. is welcome at this point. Maybe I will open a build topic at some point. |
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