SOLVED 2004 Mazdaspeed SEE POST #22
06-24-2014, 12:17 PM
#1
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SOLVED 2004 Mazdaspeed SEE POST #22
Friend of mine had his car stop on the highway. He took it to a garage that tested compression and told him his motor was shot. (95K)
Brought it to me for timing belt/water pump, which seemed uneventful. It was off a few teeth.
A cold air intake has been installed and the wiring adapted, but unknown how well done.
Can not get the car to start. On first try it seemed to "diesel" for a few seconds and died. Does not fire when trying to start at all afterward.
Symptoms:
No tach movement.
Full fuel pressure good when pump runs jumped out.
Small, weak spark when first turning over but does not continue.
Plugs dry.
Fuel pump starts for short time when trying to start and then stops.
Replaced or swapped with known good or new and checked:
Main relay
Crank Angle sensor
Cam Angle Sensor
Both coils
Checked all fuses and power to all areas checked seems good.
Verified Crank Angle Sensor line back to ECU. Ground OK
Battery fully charged
All correct lights on dash on.
When cranking with OBDII reader connected, shows as 239rpm. No other codes present.
Before I tell him he will need to take it to a dealer and get raped, I need some ideas.
Brought it to me for timing belt/water pump, which seemed uneventful. It was off a few teeth.
A cold air intake has been installed and the wiring adapted, but unknown how well done.
Can not get the car to start. On first try it seemed to "diesel" for a few seconds and died. Does not fire when trying to start at all afterward.
Symptoms:
No tach movement.
Full fuel pressure good when pump runs jumped out.
Small, weak spark when first turning over but does not continue.
Plugs dry.
Fuel pump starts for short time when trying to start and then stops.
Replaced or swapped with known good or new and checked:
Main relay
Crank Angle sensor
Cam Angle Sensor
Both coils
Checked all fuses and power to all areas checked seems good.
Verified Crank Angle Sensor line back to ECU. Ground OK
Battery fully charged
All correct lights on dash on.
When cranking with OBDII reader connected, shows as 239rpm. No other codes present.
Before I tell him he will need to take it to a dealer and get raped, I need some ideas.
Last edited by olderguy; 07-15-2014 at 05:21 PM.
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06-24-2014, 01:25 PM
#3
Cpt. Slow
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You need compression for a motor to run. Although I doubt all four cylinders went out at once, does it sound even when cranking? No stronger puffs on one or two cylinders than the other?
What were the compression numbers?
What were the compression numbers?
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06-24-2014, 01:34 PM
#6
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EDIT: You are talking about the plate? Yes it is on correctly.
Last edited by olderguy; 06-24-2014 at 05:17 PM.
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06-24-2014, 01:37 PM
#7
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Seems to be no signal to spark or injectors. Don't want to think it is the ECU yet. Do not understand how the immobilizer might affect spark and fuel if it is FUBAR.
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06-24-2014, 05:19 PM
#9
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Compression test supposed to be warm and at 300 RPM
Motor is cold and not turning fast, but all cylinders are even at about 170psi.
Motor is cold and not turning fast, but all cylinders are even at about 170psi.
Last edited by olderguy; 06-24-2014 at 07:31 PM. Reason: Left off the "1"
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06-24-2014, 07:32 PM
#13
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Oil is good, radiator was full when I got it. No signs of overheating.
Pulled the crank pulley to verify trigger plate. Was and is OK.
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06-24-2014, 08:57 PM
#16
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Additional information:
The Red with Black stripe line that goes from the immobilizer to 3S on the ECU is +12 volts.
This seems to be the only connection between the two.
The Red with Black stripe line that goes from the immobilizer to 3S on the ECU is +12 volts.
This seems to be the only connection between the two.
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06-24-2014, 10:27 PM
#20
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Thanks.
Big difference! And they did some shitty wiring also.
Could be that pressurized air wiped out the MAF. I'll throw a good one on and try it NA before hooking the IC back up to it.
Big difference! And they did some shitty wiring also.
Could be that pressurized air wiped out the MAF. I'll throw a good one on and try it NA before hooking the IC back up to it.
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