94 accord wont start
#11
08-21-2013, 06:42 PM
That is an awful lot of codes. I would think that CEL-3 and 15 would cause starting problems.
I list the codes as sensor problems, but it could be the wiring or the ECU. If you have a U-pull-it junkyard near you, I would consider getting used parts if you decided to start throwing parts at it.
Was any work done on this car previously?
The CEL-17/D4-4 are both indicating a problem with the vehicle speed sensor. This wouldn't cause the car to not start.
CEL-3 is the MAP sensor and CEL-7 is the TPS sensor. You do have them plugged in properly.
CEL-15 is for the ignition signal.
Here are some basic tests.
Unplug the map sensor, turn the key to the II position. Measure the voltage between the yel/wht wire and ground. You should get ~5V.
Unplug the TPS and do the same voltage test on the yel/blu wire.
Also, remove the bolt for G101. Clean the bolt and eyelet with a wire brush or sandpaper. That is an important ground. It is located on the side of the upper intake manifold (driver's side of it to be more exact). See pic below.
I list the codes as sensor problems, but it could be the wiring or the ECU. If you have a U-pull-it junkyard near you, I would consider getting used parts if you decided to start throwing parts at it.
Was any work done on this car previously?
The CEL-17/D4-4 are both indicating a problem with the vehicle speed sensor. This wouldn't cause the car to not start.
CEL-3 is the MAP sensor and CEL-7 is the TPS sensor. You do have them plugged in properly.
CEL-15 is for the ignition signal.
Here are some basic tests.
Unplug the map sensor, turn the key to the II position. Measure the voltage between the yel/wht wire and ground. You should get ~5V.
Unplug the TPS and do the same voltage test on the yel/blu wire.
Also, remove the bolt for G101. Clean the bolt and eyelet with a wire brush or sandpaper. That is an important ground. It is located on the side of the upper intake manifold (driver's side of it to be more exact). See pic below.
#12
08-21-2013, 09:32 PM
Just me but can you tell us more about the sprak and how it was tested? Was it a good/nice blue spark?
Have you tried to spray carb cleaner into the TB - Open the butterfly and give it a good 5 sec shot of cleaner. Then try to start the car?
Also, just me but you have the initial codes. Clear them. Try starting the car and then re-check the codes. Which is any come back?
Have you tried to spray carb cleaner into the TB - Open the butterfly and give it a good 5 sec shot of cleaner. Then try to start the car?
Also, just me but you have the initial codes. Clear them. Try starting the car and then re-check the codes. Which is any come back?
#13
08-21-2013, 09:35 PM
That is an awful lot of codes. I would think that CEL-3 and 15 would cause starting problems.
I list the codes as sensor problems, but it could be the wiring or the ECU. If you have a U-pull-it junkyard near you, I would consider getting used parts if you decided to start throwing parts at it.
Was any work done on this car previously?
The CEL-17/D4-4 are both indicating a problem with the vehicle speed sensor. This wouldn't cause the car to not start.
CEL-3 is the MAP sensor and CEL-7 is the TPS sensor. You do have them plugged in properly.
CEL-15 is for the ignition signal.
Here are some basic tests.
Unplug the map sensor, turn the key to the II position. Measure the voltage between the yel/wht wire and ground. You should get ~5V.
Unplug the TPS and do the same voltage test on the yel/blu wire.
Also, remove the bolt for G101. Clean the bolt and eyelet with a wire brush or sandpaper. That is an important ground. It is located on the side of the upper intake manifold (driver's side of it to be more exact). See pic below.
I list the codes as sensor problems, but it could be the wiring or the ECU. If you have a U-pull-it junkyard near you, I would consider getting used parts if you decided to start throwing parts at it.
Was any work done on this car previously?
The CEL-17/D4-4 are both indicating a problem with the vehicle speed sensor. This wouldn't cause the car to not start.
CEL-3 is the MAP sensor and CEL-7 is the TPS sensor. You do have them plugged in properly.
CEL-15 is for the ignition signal.
Here are some basic tests.
Unplug the map sensor, turn the key to the II position. Measure the voltage between the yel/wht wire and ground. You should get ~5V.
Unplug the TPS and do the same voltage test on the yel/blu wire.
Also, remove the bolt for G101. Clean the bolt and eyelet with a wire brush or sandpaper. That is an important ground. It is located on the side of the upper intake manifold (driver's side of it to be more exact). See pic below.
#14
08-21-2013, 10:29 PM
The ECU will detect certain problems even if the car won't start.
One thing you can try is to pull the 7.5 amp backup/radio fuse in the engine bay fuse box for a minute. That will clear all codes. Try starting the car, then recheck the codes. That may narrow down the problem. It is a simple test that won't take much time.
One thing you can try is to pull the 7.5 amp backup/radio fuse in the engine bay fuse box for a minute. That will clear all codes. Try starting the car, then recheck the codes. That may narrow down the problem. It is a simple test that won't take much time.
#15
08-21-2013, 10:53 PM
yes the check engine light did come on before the starting problems. I shut the car off and restarted it it started fine so I shut it back off. went to start it the following day and it wouldn't start. there was a code for the d4 as well it was 4. the wire colors are tps= yellow with black stripe, red with black stripe , green with black stripe.
Map= Yellow with white stripe, Green with white stripe, white with yellow stripe
Map= Yellow with white stripe, Green with white stripe, white with yellow stripe
#18
08-21-2013, 11:02 PM
I saw 1992 (missed the part it was a Civic) near your forum name. Okay.
Just checked the 1994 circuit diagram, your TPS and MAP connectors are okay.
94: TPS - Yel/Blu, Red/Blk, and Grn/Blu
94: MAP - Wht/Yel, Yel/Wht, and Grn/Wht
Just checked the 1994 circuit diagram, your TPS and MAP connectors are okay.
94: TPS - Yel/Blu, Red/Blk, and Grn/Blu
94: MAP - Wht/Yel, Yel/Wht, and Grn/Wht
Last edited by redbull-1; 08-21-2013 at 11:09 PM.