Stalls and wont restart

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 rpms high because it is bucking and cutting out and just wants 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 test0psi per cyl. Leak down test% 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 cant 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 wont 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. Thanks Don
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wrote:

I wonder if the problem is caused by the coolant temperature sensor.
Rob
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"Rob Muller" wrote:

I did not check this sensor. Would temporarely unplugging it confirm this? Also I just looked in past post and 1 thread refers to a site with trouble codes. Normal condition is code 2 which should be 2 pulses followed by a 2 second pause. All I get is a steady 1hz pulse Don
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wrote:

I suspect the problem is caused by washing the engine bay. Maybe the connector came a bit loose?

You can find a wealth of information at http://www.hmaservice.com
If I understand it correct, the 1Hz pulse means there are no error codes. Maybe the ignition system is just still wet? Try drying every part of the ignition system. To speed up the drying you can idle the engine a few minutes until the fan comes on and let it cool down again.
Rob
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If you pressure washed it, it's possible you got water inside the optical crank/cam sensor on the head. This'll cause some crazy stuff.
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"Donr" wrote: > [quote:f106331efa="Rob Muller"]On 20 Aug 2005 21:36:31 -0400, > [b:f106331efa]I wonder if the problem is caused by the coolant > temperature sensor. [/b:f106331efa]Rob[/quote:f106331efa] > > I did not check this sensor. Would temporarely unplugging it > confirm this? > Also I just looked in past post and 1 thread refers to a site > with trouble codes. Normal condition is code 2 which should be > 2 pulses followed by a 2 second pause. All I get is a steady > 1hz pulse > Don
Rob You were right on the nose. Very good call. Thanks a bunch. Here is what I did. Looked up wat resistance should be at ambiant temp. In my case, was 2.2Kohms @ 20C. Unplugged the senser and substituted a 2.2K resistor. Instant start. Let it idle for awhile till it was hot. Sut down and attemt to restart. Hard to start. Resistance should be around 1.1K @ 40C. Paralelled another resistor of same value to bring it down to 1.1K and bingo. Started and ran fine instantly. I got the right part today and all is well. Had no idea that the temp. sensor could make the car run so lousy. Don
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Is it running really rich when it starts?
May be injectors sticking open and coincidently occurred when you cleaned.
I have an lpg fueled excel and have similar problems when I use petrol to start sometimes.
Donr wrote in message

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