immanuel__7

iTrader: (8)

this car turns over and stumbles all most starting but dose not. it will start up only with starting fluid (either) but once it burns that it stalls so hers the stuff I looked at:

#1 fixed the leading ignitor (so i have good spark on leading and trailing)
#2 good timing
#3 fuel pump swapped one from a 88 tank and all
#4 fixed the leaking fuel line
#5 good compression
#6 looked at the Ohms on the injectors there ok
#7 tried the unfolding method and still nothing (keep in mind when i try the unfolding method it seams like #2 rotor is the only one with lots of gas i have to crank the car for about 30sec to clear it {and yes the fuel relay is unplugged when i do this} or is it that #1 rotor is not getting fuel? #2 lower sparkplug hole when i try to un flood it looks like a big injector there so much gas mists coming out)
#8 looked at all the vacuum lines and they all look good ( should just replace them mabey just in case.
#9 the AFM is all with in specs


now for the question part:

#1 i looked at the volts going to the injector with the key on and there nothing while carking nothing either. Ohm on the other hand i get something like 125 ohms on#2 and something like 14 on #1 while carking is that normal if not what is causing this difference?
#2 the sub-zero fluid tank is empty can this be the problem? of the car not wanting to start
#3if the secondary injectors are stuck open on #2 can this do that? if so how can i shut them down just to see if this would resolve the problem?
#4 what else did i mis?
#5 fuel relay (the one under the dash) when the key is first turned on should this relay allow power to the fuel pump to pressures the system?
#6 I only get about 9 volts when carking the engine over at the fuel pump connector is that normal (when i use the yellow jumper i get 12 volts)
#7 dose that mean the fuel relay is bad?
#8 if the relay is bad would this be one reason the car is not starting up fully because its only getting 8 to 9 volts.
#9 my 85 se 12A when i turn the key on i get 12vots to my pump but not this 87 is that normal for those car?

thanks for all your help in advance i know this was long but its all the info needed i think

SureShot

I assume this is an 87 NA and it has the original motor..

#1) Your VOM may not react quick enough to see the short duty cycle of the cranking pulses.
Measuring Ohms in an energized circuit could hurt your meter.
The different values you got are not normal, so either one of the injectors is bad or the ECU is hurt.

#2) The sub zero system is only to help with cranking compression in extremely cold conditions.
Mazda has a TSB suggesting it be disabled.

#3) There are injector service shops in most metro areas.
They can test & clean them.
They generally do most of their work on diesel injectors, but can also handle gas injectors.

#4) You’re on the right track.

#5) Yes

#6) Normal

#7) No

#8) You have power, so the relay is OK.

#9) Normal

You’ve got spark, but the fuel injectors probably need a good clean & test.
Have you changed the fuel filter & the in-tank fuel pickup strainer lately?

immanuel__7

iTrader: (8)

ok thanks for the info:

what is the VOM and a TSB?
and i cant realy change the fuel filter in the tank because the fuel pump plate screws are so rusted that if i try to take them off there just going to brake off and make a big mess and end up getting rust in the tank (if i test to see how much fuel presure i get and it meets the specs can i just skip the filter?)

immanuel__7

iTrader: (8)

o yes and an other thing is that i took the injectors off an 88 and the fuel preshure regulators assemmbly and installed it on the 87, the same amout of gas was found in the #2 rotor, il try to swap the stock injectors today to see if the #2 rotor housing will still get as much gas and not much in the #1 housing, this should eliminate the bad injector wright?

SureShot

VOM = volt/ohm/milliammeter
TSB = Technical service bulletin

It sounds like you swapped the secondary injectors OK.
Did you also check the primary injectors?

The fuel pump access screws should have very light torque.
The trick is a freshly ground Phillips screwdriver & a little shot of “PB Blaster”.

immanuel__7

iTrader: (8)

ok heres is an up date on this car:

seing as the car all most start up with eather we just keeped spraying it in the intake still the car started up! thast it it run! the only problem now is that sometimes the leading coils just quit runing whats up with that?
but thanks to all that help with this 87 n/a project!! i have learnt so much with this car, all your help should help me with my mechanincs course im taking at fanshawe