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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Honda
Satisfied Customers: 2288
Experience:  Owner at Carolina Auto service & Sales , 20 years Experience in Foreign & Domestic vehicles
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2001 honda civic ex 1.7 4ATM code P0304 after installing

Customer Question

2001 honda civic ex 1.7 4ATM code P0304 after installing short ram intake shakes violently on reverse and drive
Submitted: 7 months ago.
Category: Honda
Expert:  Dan replied 7 months ago.

Hello, my name is***** problem happen immediately after installing ram intake or did it take awhile? Thanks.

Customer: replied 7 months ago.
Immediately, I also cleaned the end give bay with degreaser and a hose with a nozzle I don't know if that had to do anything with it.
Customer: replied 7 months ago.
Engine*
Expert:  Dan replied 7 months ago.

That was most likely the problem. Cleaning engine bay with anything other then a rag soaked with cleaner is a bad idea. I'd start by checking coil connector, injector connector, and any other connectors that you may have sprayed down. If good then next step is to check for spark and injector pulse on cylinder 4. Let me know how it goes, thanks.

Customer: replied 7 months ago.
If injector had no pulse the car would not start?
Expert:  Dan replied 7 months ago.

I was referring to no injector pulse on cylinder 4. IF all cylinders had no injector pulse it wouldn't start but it would start if you were only missing pulse on one injector.

Customer: replied 7 months ago.
Injector is right behind the coil?
Expert:  Dan replied 7 months ago.

Here is a picture, vehicle may run fine after sitting for a day or two when the connector dries out. Let me know how it goes thanks.

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https://www.dropbox.com/s/0weqrm7cef0qi3f/fin.pdf?dl=0

Customer: replied 7 months ago.
It still has the same issue. All connectors are working fine I did find this screw laying around don't know if it's from the car
Expert:  Dan replied 7 months ago.

Did you check spark and injector pulse? If not, I'd do that next.

Customer: replied 7 months ago.
Yeah everything seems fine changes the spark plug and coil just in case but car still not working turns on and the shuts off after a while
Expert:  Dan replied 7 months ago.

Did you actually check for spark and injector pulse? Still getting the misfire on cylinder 4 code?

Customer: replied 7 months ago.
I still have misfire
Expert:  Dan replied 7 months ago.

I'll open question back up to see if someone else has some ideas. If injector pulse and spark are good I'm not sure what the problem is. Someone will reply automatically when they can help. Thanks.

Expert:  Chad Farhat replied 7 months ago.
Hey my name is ***** ***** I will be assisting you .Can you put a test light on the injector connector and check for ground , meaning ( the test light lead alligator clip on the Posistive side of the battery and now anything the test light probe touches and lights up , that means you found ground, while car running come from the back of the injector and back probe it and tell me if that test light pulsate , on & off , on & off
Expert:  Chad Farhat replied 7 months ago.
http://www.walmart.com/ip/Tool-Aid-TA-36310-Electronic-Fuel-Injection-and-Ignition-Spark-Tester-Kit/24814302?wmlspartner=wlpa&selectedSellerId=202&adid=22222222227035617988&wl0=&wl1=g&wl2=t&wl3=76258045114&wl4=&wl5=pla&wl6=177253633954&veh=semThis will be ideal foe testing, we want know are getting ground from PCM to fire that injectors?
How many miles on vehicle ?Please let me know
Chad(aka-Jhook1398)