1998 Honda Civic DX P0303, P0300, P1399 Please Help
01-11-2018, 08:21 AM
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1998 Honda Civic DX P0303, P0300, P1399 Please Help
Hello everyone sorry if im posting this in the wrong forums im new to the site just have a really confusing misfire in my Civic and gonna explin and see if you guys could help, my CEL flashes everytime i start my car cleared codes numerous upon numerous times heres everything ive replaced with new parts distributor, spark plugs (NGK), spark plug wires, fuel injectors, air filter, and also intake manifold gasket but im still having misfire car shakes really rough when stopped and even stalles from time to time and also when it wants to stall my oil light flickers as if car is going to stall and accessory lights are trying to come on any help would be appreciated if i missed any details let me know ill add them
02-08-2018, 12:32 PM
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Re: 1998 Honda Civic DX P0303, P0300, P1399 Please Help
Bump for help? Today my car started to overheat and all coolant is going to expansion thing but not going back to radiator
02-08-2018, 02:44 PM
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Re: 1998 Honda Civic DX P0303, P0300, P1399 Please Help
Start with a compression test to verify that the engine has mechanical integrity.
If that is OK then go to a power drop test where you disconnect the fuel injectors one at a time to see which cylinder is not working.
If that is OK then go to a power drop test where you disconnect the fuel injectors one at a time to see which cylinder is not working.
02-08-2018, 02:59 PM
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Re: 1998 Honda Civic DX P0303, P0300, P1399 Please Help
Ok thx ive been thinking about doing compression test but unsure since ill have to talk to my dad but i guess thats next as for injectors ive done that once when i first started having this problem and it seemed like there wasnt much difference when i pulled the cylinder 3 injector but i just thought injector was bad so bought new ones but ill also do that again thx for suggestions
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03-07-2018, 01:14 PM
#10
Re: 1998 Honda Civic DX P0303, P0300, P1399 Please Help
It sounds like you have a random misfire affecting all the cylinders... I agree check the compression first to rule that out; but this does sound like a problem with ignition.
You took several good troubleshooting steps-- plugs, wires, injectors -- you're on the right track but it sounds like the problem still exists. You didn't say whether you checked the ignition coil. Does your RPM gauge go wacky when it decides to run rough and stall? It runs off the ignition coil.
I have a 98 Civic D16Y8 engine that I was chasing a random misfire for a long time on and finally it wound up being the ignition coil. That's inside the distributor.
Let me know if you need pertinent pages from the service book. Tell me what engine you have to be sure.
You took several good troubleshooting steps-- plugs, wires, injectors -- you're on the right track but it sounds like the problem still exists. You didn't say whether you checked the ignition coil. Does your RPM gauge go wacky when it decides to run rough and stall? It runs off the ignition coil.
I have a 98 Civic D16Y8 engine that I was chasing a random misfire for a long time on and finally it wound up being the ignition coil. That's inside the distributor.
Let me know if you need pertinent pages from the service book. Tell me what engine you have to be sure.
03-07-2018, 03:04 PM
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Re: 1998 Honda Civic DX P0303, P0300, P1399 Please Help
It sounds like you have a random misfire affecting all the cylinders... I agree check the compression first to rule that out; but this does sound like a problem with ignition.
You took several good troubleshooting steps-- plugs, wires, injectors -- you're on the right track but it sounds like the problem still exists. You didn't say whether you checked the ignition coil. Does your RPM gauge go wacky when it decides to run rough and stall? It runs off the ignition coil.
I have a 98 Civic D16Y8 engine that I was chasing a random misfire for a long time on and finally it wound up being the ignition coil. That's inside the distributor.
Let me know if you need pertinent pages from the service book. Tell me what engine you have to be sure.
You took several good troubleshooting steps-- plugs, wires, injectors -- you're on the right track but it sounds like the problem still exists. You didn't say whether you checked the ignition coil. Does your RPM gauge go wacky when it decides to run rough and stall? It runs off the ignition coil.
I have a 98 Civic D16Y8 engine that I was chasing a random misfire for a long time on and finally it wound up being the ignition coil. That's inside the distributor.
Let me know if you need pertinent pages from the service book. Tell me what engine you have to be sure.
03-09-2018, 05:23 AM
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Re: 1998 Honda Civic DX P0303, P0300, P1399 Please Help
Open the hood and check to see if there's a cow under there. If so, yes you have the D16Y7.
03-11-2018, 07:10 AM
#16
Re: 1998 Honda Civic DX P0303, P0300, P1399 Please Help
You also didn’t answer my question whether the RPM gauge jumps around when the engine acts up. And I don’t mean the RPMs falling a little bit, I mean the gauge spiking and going insane.
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