Well im back at it again. The 93 motor in the 95 car(n/a 850 5spd) It ran well then it got parked got cold and now no start. We got it the shop yesterday so it can warm up and then we will see what it does. However at the moment it has no spark....sorta. When you turn it over it may or may not spark sporaticaly and when you turn the key off the coil dumps its juice and it sparks. Its not throwing any codes for cam or fly wheel sensors but it is throwing one for ECT. What sensors control spark??? Also there seems to be some code stuff i need to figure out... I have access to a website that tells you everything about everything and it has me confuzeled as it seems there different set of codes for auto vs stick (and what are P codes??) On the site they have a generic list of codes for the 95 850 but some are for the automatic and have nothing to do with the stick... Once i figure the site out a bit more it will help but at the moment.....grrrrr to much stuff!!!!! it even tells you labor times Lol Later I am going to swap out the easy sensors and see what happens. I seem to recall someone else having a no start issue a while back on an engine swap what ever came of that?? Thanks for your time Zech

 

I believe spark timing works off the cam position sensor.

What do you mean, it dumps the juice and sparks when you turn the key off?

 

We unhooked the cap and rotor and grounded out the coil to see what what would happen. Most of the time it would spark when you turned off the key. By dumped i mean released.... I was told that either the voltage spikes as the key is turned off or that its not getting the signal to fire and when it is shut off it simply releases stored energy. Thanks for the reply. Im heading off work on it now so we will see what else i dig up wish me luck!!

 

What web site is that ??

"P" codes are codes you pull from the OBDII port with a scanner and are standardized on all vehicles sold in America. They can be both generic in that they will relate to any make and model vehicle while some are more specific where you need to know manufacturer to narrow them down and still others that are manufacturer specific. The last ones, manufacturer specific will pull up the code but sometimes won't tell you what it means on the scanner itself and you need to do some searching to find out what it refers to.
The confusion you are coming across is pulling the codes from the Volvo OBDI port. I'm not positive but the codes you get from that port A1, A2 .... B1 .... do not correspond to the OBDII codes you would get with a code reader. All OBDII "P" codes are four digits where the Volvo OBDI codes are three digits.

 

BOSCH EZ129K
1) Disconnect coil wire from distributor cap. Put coil wire
next to ground and operate starter motor. If spark is present, check
distributor rotor and cap. If spark is not present, go to next step.
2) Connect voltmeter between ignition coil connector terminal
No. 15 (Red wire) and ground. Turn ignition on. If battery voltage is
not present, check voltage supply to ignition coil. If battery voltage
is present, turn ignition off and go to next step.
3) Connect voltmeter between ignition coil terminal No. 1
(Blue wire) and ground. Operate starter motor. If about .7-1.3 volts
are present, repeat test using new ignition coil. If about .7-1.3
volts are not present, turn ignition off and go to next step.
4) Disconnect engine speed sensor connector located close to
flywheel. Connect an ohmmeter between sensor terminals. If resistance
is about 200-400 ohms, go to next step and check Camshaft Position
Sensor (CMP) signal. If resistance is not about 200-400 ohms, replace
sensor.
NOTE: Engine speed sensor is also known as Vehicle Speed Sensor
(VSS) or impulse sensor.
5) Remove intake hose. Bend aside rubber sleeve on CMP
connector. Connect voltmeter between connector terminal No. 2 and
ground. See Fig. 4. Operate starter motor. If voltage reading varies
between 0-5 volts, go to step 7). If voltage reading does not vary
between 0-5 volts, go to next step.
Fig. 4: Identifying Camshaft Position Sensor (CMP) Terminals
Courtesy of Volvo Cars of North America.
6) Connect voltmeter between CMP connector terminal No. 3 and
ground. Turn ignition on. About 10 volts should be present. Turn
ignition off. Connect an ohmmeter between CMP connector terminal No. 1
and ground. Ohmmeter should show about zero ohms. If voltage supply
and ground are okay, repeat test using new CMP. If voltage supply and
ground are not okay, reconnect intake hose and go to step 9).
7) If voltage reading varied between 0-5 volts in step 5),
disconnect power stage connector at ignition coil. Bend back rubber
sleeve on connector. Check ground supply by connecting ohmmeter
between connector terminal No. 1 and ground. See Fig. 5. Ohmmeter
should indicate zero ohms. Check voltage supply by connecting
voltmeter between terminal No. 3 and ground. Turn ignition on. Battery
voltage should be present.
Fig. 5: Identifying Power Stage Connector Terminals
Courtesy of Volvo Cars of North America.
8) Check power stage control signal by connecting voltmeter
between terminal No. 4 and ground. Operate starter motor. Voltmeter
should indicate .7-1.3 volts. If ground, voltage and control signal
are okay, repeat test using new power stage. If ground connection and
voltage are faulty, check wiring. If control signal is not present, go
to next step and check ECU input and output signals.
9) Connect Breakout Box (981 3190) and Adapter (981 3195) to
distributor ignition ECU. See Fig. 3. Turn ignition switch to OFF
position. Distributor ignition ECU is located in right side of engine
compartment. Remove ECU cover. Disconnect distributor ignition ECU
connector. Visually inspect all terminal connector sleeves to ensure
no terminals are damaged.
10) To install breakout box, remove distributor ignition ECU.
Press adapter onto distributor ignition ECU and pull lead upward
through slot beside module. Press distributor ignition ECU, with
adapter connected, into connector in bottom of ECU box. Connect
breakout box to adapter 60-pin connector.
11) Ensure ignition is off. To check ECU input and output
signals, connect ohmmeter between breakout box terminal No. 20 and
ground, then between breakout box terminal No. 29 and ground. Ohmmeter
should indicate about zero ohms in both cases.
12) Ensure ignition is off. Connect ohmmeter between breakout
box terminals No. 20 and 2, and between breakout box terminals No. 20
and 15. Ohmmeter should indicate about zero ohms in both cases.
13) Ensure ignition is off. Connect voltmeter between
breakout box terminals No. 20 and 10. Battery voltage should be
present. Turn ignition on. Connect voltmeter between breakout box
terminals No. 20 and 30. Battery voltage should be present.
14) Check engine speed sensor signal by connecting voltmeter
between breakout box terminals No. 1 and 2. Operate starter motor.
Voltmeter should indicate 300-400 millivolts. If signal is not
present, check sensor. See Code 1-3-1 diagnosis procedures in the
G - TESTS W/CODES article. If signal is present, go to next step and
check Camshaft Position Sensor (CMP) signal.
NOTE: Engine speed sensor is also known as Vehicle Speed Sensor
(VSS) or impulse sensor.
15) Connect voltmeter between breakout box terminals No. 20
and 4. Operate starter motor. Voltage should vary between 0-5 volts.
If voltage is okay, go to next step. If voltage is not okay, connect
voltmeter between breakout box terminals No. 20 and 14. Voltmeter
should indicate about 10 volts. If voltage is present, but signal is
not present, repeat test using new CMP. If voltage is not present,
repeat test using new ECU.
16) If voltage was okay in step 15), connect voltmeter
between breakout box terminals No. 20 and 43. Operate starter motor.
Voltage should indicate about 5-7 volts. If voltage is not present,
repeat test using ECU. If voltage is present, ignition system is
operating properly.

ed: the breakout box they refer to is a specialty tool that allows you to check the ECU connection pins with the ECU still plugged up. Basically you remove the ECU and this thing hooks up in parallel. I don't know if the terminal numbers they refer to on their tool, correspond in any way to the pins as you see them when the ECU is removed.

 

Thanks turkey sandwich! I will be tracing through that stuff this weekend. @ kiss for a fog Its an all data site idk if thats the name though. oddly we got it to start yesterday.....ran great.... wont start back up Lol