Car

Ask a Car Question, Get an Answer ASAP!

Have your own Car question?

10 Auto Mechanics are Online Now

characters left:

Not a Car Question?

Question

have i sonata 2000 4 cyl coil are good i have power on both coil connectors but 2 and 3 dont get any spark.it will crank but engine shakes iddle is around 500 or less and have no power .thanks a miilion for your help. adrian

Submitted: 25 days and 10 hours ago.

Category: Car

Value: $23

Status: CLOSED

Year: 2000
Make: Hyundai
Model: sonata
Engine: 2.4l

Already Tried:
disconect sensors and each one of them make the engine worse all of them but the map.the map is like if i did not dissconect anything

Posted by Dan 25 days and 10 hours ago.

Answer

On each coil there are 3 wires. 1 wire should have power, 1 wire should have ground, and the computer pulsates ground off and on to actiave the coil. So you will need to see which wire is having problem then test that same wire at the computer to see if its working if not the computer is the problem if so you will need to fix/replace the wire. Let me know if you have questions, here is a diagram and I circiled the wire in red that is likely giving you problems. Let me know if you have questions. Thanks

View Full Image

25 days and 9 hours ago.

Reply

got power on all three one with a brigth light one with less light and the last one with a poor light how much voltage should i be getting?

Accepted Answer

There is a black wire that goes to each coil and they should both have a good ground. Check the black wire on both coils they should both have a good ground and let me know what you find. Each coil also has a tan/black wire going to it and it should have battery voltage. The white wire going to the working coil has the same function as the orange wire on the non working coil. Compare the differences in how each wire works from what I can see and how almost all coil systems work the orange wire should pulsate ground off/on. So if you have voltage on the orange and black wires on the non working coil there is likely a short to power. Let me know if you have questions and what you find different between the two coils. Thanks.

Accepts:
Expert:	Dan
Pos. Feedback:	100.0 %
Answered:	10/29/2009

Technician

Automotive Diploma 2 Years

22 days and 18 hours ago.

Reply

hi dan, this is XXXXXX with the sonata sorry for the delay to get back to you I did my reading of voltage as you say and i get the same readings on the black wires going to the coils also same on the tan-black wires but a difference on the orange and white with the meter on 20v on the non working coil i get 0.08 and 0.02 on the working coil this with the ignition on.

Posted by Dan 22 days and 18 hours ago.

Info Request

I dont think that small of a difference would matter but it could. Check to see if the same voltage reading is at the orange wire directly at the ECM voltage changes to the same as the working coil then replace the wire. I would also use a LED testlight to see if the wire pulsates ground off/on to see if problem is the pcm or wiring or you can do a resistance test between the coil and ecm on that wire and compare the resistance on the good coil if resistance is high replace wire if resistance is the same replac ECM. Let me know if you have questions, thanks.

22 days and 17 hours ago.

Reply

try what you just told me and the comes on and then go of on both coils ,try to started and it did not but both coils get hot .

Posted by Dan 22 days and 13 hours ago.

Info Request

Ok, swap the coils just to make sure that the problem stays on that one side then the next step is to do a resistance test between the coil and ecm. You can also do a voltage drop on both of the coils between the negative and battery negative and power and battery power while trying to start vehicle and this will show the difference in power, it should be small. Compare it to the differences on the coil with the properly working circuit. If everything is the same other then the orange wire then you will need to do a resistance problem to verify it is not a wiring problem if not replace the ecm. Let me know if you have questions, thanks.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Car

Have your own Car question?

Related Car Topics:

Question

have i sonata 2000 4 cyl coil are good i have power on both coil connectors but 2 and 3 dont get any spark.it will crank but engine shakes iddle is around 500 or less and have no power .thanks a miilion for your help. adrian

Optional Information

Year: 2000
Make: Hyundai
Model: sonata
Engine: 2.4l

Already Tried:
disconect sensors and each one of them make the engine worse all of them but the map.the map is like if i did not dissconect anything

Answer

Reply

got power on all three one with a brigth light one with less light and the last one with a poor light how much voltage should i be getting?

Accepted Answer

Reply

Info Request

Reply

try what you just told me and the comes on and then go of on both coils ,try to started and it did not but both coils get hot .

Info Request

Car

Have your own Car question?

Related Car Topics:

Question

have i sonata 2000 4 cyl coil are good i have power on both coil connectors but 2 and 3 dont get any spark.it will crank but engine shakes iddle is around 500 or less and have no power .thanks a miilion for your help. adrian

Optional Information

Year: 2000Make: HyundaiModel: sonataEngine: 2.4l Already Tried: disconect sensors and each one of them make the engine worse all of them but the map.the map is like if i did not dissconect anything

Answer

Reply

got power on all three one with a brigth light one with less light and the last one with a poor light how much voltage should i be getting?

Accepted Answer

Reply

Info Request

Reply

try what you just told me and the comes on and then go of on both coils ,try to started and it did not but both coils get hot .

Info Request

Related Car Questions

Year: 2000
Make: Hyundai
Model: sonata
Engine: 2.4l

Already Tried:
disconect sensors and each one of them make the engine worse all of them but the map.the map is like if i did not dissconect anything