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Old 07-24-2019, 11:44 PM   #21
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Thanks, will consider that once I get the leaky injector(s) fixed.
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Old 08-25-2019, 08:24 PM   #22
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I have not given up and thanks for all the help so far. I just got back from a month long vacation in my home island in the Pacific.

I picked up more diagnostic tools to test relays, fuses and sensors. I also replaced the fuel injectors and the fuel rail pressure sensor. The old fuel pressure sensor literally crumbled apart when I removed it. Then I started testing fuel, spark, compression, all over again. I was careful this time to keep the batt charged and check for unspent fuel in the cylinders. All components seemed to be in place so I did a test to see of I get combustion - made sure the plugs were dry and with the fuel pump relay and fuse disconnected and gas pedal on the floor, I started the car with starting fluid (first start in over six weeks). A lot of white smoke came out at first but disappeared as the car warmed up. I took my foot off the gas pedal and was expecting the engine to die but it never did so I let it run for about 10 minutes. During this time with no fuel pump relay and fuse, the scan tool said fuel pressure was 8-9 psi. It also finally registered a CEL and the codes were:
P0191 – Fuel Rail Pressure Sensor Circuit
P2196 – O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1
I then re-inserted the fuel pump relay and fuse and was able to start the car. I drove it around the block for about 10 minutes. It drove fine up to about 2,500 rpm but experienced some power loss and misfiring when trying to get the car up to speed. The live data scan tool said fuel pressure of 38-42 psi.

I’m guessing I should change the 15 yr-old O2 sensor (maybe upstream and downstream?) and test the fuel pump. I will research that.

Anyone have any thoughts or experience that may help me in my next steps?
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Old 08-26-2019, 06:20 AM   #23
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After researching and sleeping on it, it occurred to me that the codes may be due in part to the unplugged fuel relay and fuse. I'm going to clear the codes and add some fresh gas next.
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Old 08-26-2019, 06:50 AM   #24
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Quote:
Originally Posted by WhatALemon View Post
After researching and sleeping on it, it occurred to me that the codes may be due in part to the unplugged fuel relay and fuse. I'm going to clear the codes and add some fresh gas next.
Fuel pressure looks good.
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Old 08-26-2019, 06:44 PM   #25
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Originally Posted by pbfoot View Post
Fuel pressure looks good.
Thanks for saving me research time on fuel psi. Did clear the codes and added fresh gas.

Anyway, it seems I have success. As posted, finally got the car running yesterday after replacing the fuel rail pressure sensor and fuel injectors but it still ran rough under higher load. Got to researching possible causes of the P2196 code (which was probably bogus since I had the fuel pump relay and fuse disconnected) and decided that I needed to inspect the MAP sensor. When I pulled the MAP sensor, I thought it odd that it was orange but after cleaning, it was actually black... See attached pics of before and after. (BTW, because of this site, I knew to re-tune the engine after any changes like this). After cleaning MAP sensor, I was pleasantly surprised the car started right up. Then I drove it without ANY hesitation or misfires. Although it has only be about 12 miles of driving, so far there are no more issues or CEL and most awesome is there is no more slight smell of fuel.

As I look back at it, one or more of the injectors was spewing more than the others so I replaced them all. The few rail pressure sensor had signs of failing so it was replaced (glad I did because it fell apart upon removal). The MAP sensor was really dirty and I cleaned it.

After all this, the knocking sound of the intake manifold flaps never sounded so good!!!

Thanks to all for providing your input and helping to increase my knowledge (and prompt me to acquire diagnostic tools).
Attached Thumbnails
2005 ZX3 Cranks But Won't Start-before-long.jpg  

2005 ZX3 Cranks But Won't Start-before-close.jpg  

2005 ZX3 Cranks But Won't Start-after-close.jpg  

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Old 08-26-2019, 07:35 PM   #26
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Good job. Keep us updated if anything changes.
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