wood caver is correct.
"you can't because there is no spark" < or is it not cranking,,,
no spark implies , cranks ok, but no spark, but some my confuse this.
he said it woodnt start, but he id not say it would not crank.
if it wont crank , the battery has a dead cell , or bad starter or bad starter solenoid, or bad connections to same or bad clutch start switch or park neutral switch if autotranny.
so does it some times fail to crank.
that should be the first question.
1991 , 16valve, unknow transmission.
please tell how starter sounds.
is it robust or does it just barely crank and make HL dim.
__________________ http://carfix.stufftoread.com/
click me.
91'-8v,2dr,4wd,Conv. Market#E03
My server has Engine Repair proc/data. Check it out.
My Car is a 16 valve manual transmission. The Battery appears to be fine and it has a fine crank, it just doesn't want to start because there is no spark. I have already gone through some of the grounds and took a wire brush to the bolts to remove rust. I have also checked the plug to the dizzy (though I haven't cleaned it out yet). I will continue to experiment as time allows.
Thank you so much jtgh and all you other guys out there who have helped me. I have a strong feeling that I am close to solving the problem.
~Sean
Sounds like you got a good deal. jtgh is right, intermitant problems are the worst kind. Sometimes you just want to shot what ever it is that your working on( Don't do that by the way). Even professionals hate them with a passion. Good luck!!
Thanks for the encouragement. I am hoping for some results real soon now. Just have a few more tests and fixes and I just know the solution right around the corner
aligators, in the swam and forgot, to drain it.l
ok
my bad,
does
the CEL lamp glow at key on , no start.
it must or ecu or lamp is toast.
then lamp must go off , after started.
always watch that lamp if it is out ,just before cranking then the ECU is crashing.
Secret: ECU glows the lamp below 500 rpm, cranking is 300 max.
this would be rare as ECU has backup , to start engine, but ECU could be very very sick.
if ecu key lamp test works , then call up the diagnostic codes. must be 12.code.
secret#2:
one can call up diagnostic codes while cranking. it will give a special code for loss of CAS while cranking , , simple insert diag jumper (paper clip) and crank. note flash codes .
You dont have a DMM , DVM or DSO ,so setting a mouse trap is hard.
I once drove a week waiting for a drop out , but BANG, I found it. and it was killing ignition too. ( i hate pushing cars, ).
one can keep moving the trap to islolate a power feed problem ,etc.
cheers.
the best tool to find an intermittant is to lay a mouse trap.
i have even run wires from connections in the egine bay and have them in the cab connected to a VM or a DSO.
16v manual, car cranks and does not start , at times.
and is known to be loss of spark.
__________________ http://carfix.stufftoread.com/
click me.
91'-8v,2dr,4wd,Conv. Market#E03
My server has Engine Repair proc/data. Check it out.
My DMM has a logging port and can log to a PC via USB , anything it measures.
it can measure Amps, volts, cap, ohms, transistor beta, for days on end.
one connects it , sets it up and logs to Laptop harddisk. A simple ASCII file that Excel can read.
I also have a cigarette pack size 8 channel data logger that can long voltages at 2000 times a second, to EEPROM. IT time stamps too the data. self contained.
it is just a black box with an internal battery pack and a multichannel A/D chip. and CPU.
digital scope
or digital storage scope
hand held ,
can be used to watch Oxygen sensor live.
to look at CAS signals. Ignitor input and outputs. ANYTHING , CPS, , all.
to look at noise from Fuel pump or bad diode created noise in Alternator.
and for finding any intermittants. especially with logging features and fancy triggering modes.
DIY:
one can take a flip flop TTL chip put it in a box and connect a .1 uf capactor to the
negative edge input.
then connect this to any 12 power line or static High signal.
if the power drops , the FLip flop sets, and the LED glows. (very handy)
i have 2 inputs, with both positive and negative triggers.
the second input can be used for a logic low (ground) normal signal that might glitch high. I call this tool my glitch finder. ( can post schematic, no problem, i designed it)
I have found problems with this simple $3 box , that few could find.
The DSO the tool of pro's, it does it all
but a DSO can do this too , it can be set to trigger on any signal.
then store what it sees.
they used to be $3000 mininum , but now we have $250 ones coming out of china.
today there are amazing tools to find intermittants, and I have some at home, and all at work.
My DMM has a logging port and can log to a PC via USB , anything it measures.
it can measure Amps, volts, cap, ohms, transistor beta, for days on end.
one connects it , sets it up and logs to Laptop harddisk. A simple ASCII file that Excel can read.
I also have a cigarette pack size 8 channel data logger that can long voltages at 2000 times a second, to EEPROM. IT time stamps too the data. self contained.
it is just a black box with an internal battery pack and a multichannel A/D chip. and CPU.
digital scope
or digital storage scope
hand held ,
can be used to watch Oxygen sensor live.
to look at CAS signals. Ignitor input and outputs. ANYTHING , CPS, , all.
to look at noise from Fuel pump or bad diode created noise in Alternator.
and for finding any intermittants. especially with logging features and fancy triggering modes.
DIY:
one can take a flip flop TTL chip put it in a box and connect a .1 uf capactor to the
negative edge input.
then connect this to any 12 power line or static High signal.
if the power drops , the FLip flop sets, and the LED glows. (very handy)
i have 2 inputs, with both positive and negative triggers.
the second input can be used for a logic low (ground) normal signal that might glitch high. I call this tool my glitch finder. ( can post schematic, no problem, i designed it)
I have found problems with this simple $3 box , that few could find.
The DSO the tool of pro's, it does it all
but a DSO can do this too , it can be set to trigger on any signal.
then store what it sees.
they used to be $3000 mininum , but now we have $250 ones coming out of china.
today there are amazing tools to find intermittants, and I have some at home, and all at work.
Thanks for the info!! That's what I suspected, but i just had too ask. Thanks for finding a few of them for me but I already have an older Fluke 97 Scopemeter. Definatly a must have when you need it. Once again , Thank you. P.S.-Your glitch finder sounds pretty interesting. Would you mind posting or emailing me the schematics and user instructions?
Last edited by 4.3L Tracker : 07-10-2008 at 07:29 AM.
Reason: to add a little bit
P.S.-Your glitch finder sounds pretty interesting. Would you mind posting or emailing me the schematics and user instructions?
Linear Mode
