Hi guys I am new here and need some help. I have been to 2 other Sonata forums and with over 200 people that saw my thread, only one replied and offered assistance. This will be long so here I go. I purchased a 95 Sonata 2l automatic 10 days ago. Pick up the car 100 miles away and drive it home. The exhaust flexible is shot so I drive with a light foot to keep the noise down. The car runs great.
Next day I buy and install a flexible plus catalityc converter, seeing the previous owner took it off and installed a piece of pipe. I then proceed to pressure wash the engine bay after taking out the battery. Now everything is nice. Wait a few days so everything dries up good before putting back the battery I then start the car. It is idling very rough. I take off the central cover on the head and the plugs were drowning in water. So I clean everything up and restart and let the car idle for awhile. Then I decide to take a test drive. Shift in reverse and the car stalls. Can not restart. Next day, I clean the plugs wich were fouled with fuel. I start the car but I have to keep my foot on the gas because it will stall and have to keep the rpm?s high because it is bucking and cutting out and just want?s to stall, wich it did. Attempted to restart but, no go.The spark plugs were again flooded with fuel. So I proceded to check the DLC for codes with my voltmeter leads plugged into the MFI and ground. All I get is a steady voltage pulse at approx. 1hz intervall. No codes. I checked the harness going to the ECM relay and I can hear it energize when I turn on the ignition. I checked for spark and fuel, OK. Compression test=160psi per cyl. Leak down test=10% leak I did resistance test on the coils and power transistors. OK Checked the tps. OK Resistance test of the harness connectors to the VAFS, CKP sensor and whatever else I could think of. Could not check O2 voltage as I can?t keep the car running without my foot on the gas. Checked for gas in the fuel regulator vacum line but did not do a fuel pressure test. I am at a loss because this car ran good for the 100 mile ride home. I am wondering if I shorted something when I pressure washed it or if there is something restricting the exhaust. So to sum it up: Car will start once in morning but won?t idle and dies when warm if the gas peddal is touched. Will not restart unless it is cold and the plugs have been cleaned. Suggestions I have had are to replace O2 sensor ($246.00 cdn) the CKP sensor and the MAF sensor which btw I could not find. These are expensive without knowing if the problem will be fixed and you can not return these components even if the ones you have are good. So does anyone out there have an idea. The car has been in my driveway for 10 days so I am willing to try anything. Oh I was wondering if the pulsing from the ecm when I tried retrieving the codes is normal. Also my MIL or CEL is not working. Might be a burnt bulb. Few!!!! Told you it was long. Thank?s Don