Fuel injectors firing numbers

Hello, I am Danny.

I believe you are looking for the fuel Injector number one location. I have attached a diagram and a How-to link. Hope this help!
Danny-

https://www.2carpros.com/articles/how-to-replace-a-fuel-injector

Thank you. I am getting codes p0301 and p0300. I already change the spark plus, wires and coil. I get a strong smell of gas under the hood and really hard start up. I am certain it is a bad fuel injector.

Danny here. Code P0300 is random/multiple misfire and P0301 is cylinder number one misfire. It is possible to have a leaking/faulty number one Injector problem if Plugs, wires, and coils changed.

After removing intake manifold I found the number one fuel injector is burnt and the gasket for the manifold has oil all over them.

Fuel injectors.

Danny here.

Yikes! No wonder car was running poorly! Let me know how it runs when you replace injector(s). Danny-

Are the intake manifold gasket suppose to have oil on them?

Danny here. After time the gaskets are prone to leaking especially after 100,000 miles.

Would that cause the car to puff grey/blue smoke from the exhaust?

Danny here. Yes, It would. Oil getting sucked into the combustion process would be the grey/blue smoke out the exhaust.

Yea because whenever I start it, I would see a puff of smoke and I saw some oil when I looked inside of the chamber. How long you think it would it take for the car to get the remaining of the oil out?

Danny here. I am sure it would not take long! That was just oil being burned that was leaking caused by the gaskets. Be sure to install new intake gaskets upon reassembly and that all surfaces are prepped/cleaned to insure a good seal. I have attached a diagram showing the proper torque sequence for installation. These bolts are to be torqued to 105 inch/LBS.

Yes, I installed new gaskets to the intake manifold.

I went to AutoZone but unfortunately they did not have a new gasket for the throttle body.

Danny here.
Not good. The areas highlighted looks to be defective/ripped/missing.

AutoZone said it would take two days for new one to arrive.

Would the bad gasket cause a leak?

Danny here.
Yes, that is entirely possible! I would definitely install a new one!

Start starts right up with no misfire.

Danny here.
Glad to hear! Thanks for using 2CarPros.

Will a bad coolant temperature sensor cause car not to restart after going to the store for ten minutes?

Hello, Danny here.

Yes, that is possible. Here is a link:

https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor

I use a scanner and a code pop up for Po128.

Hi there.

Code P0128 is showing as Coolant Temperature Below Thermostat Regulating Temperature. Have you changed the thermostat at any time? If you do plan on doing the coolant change/flush that would be a great opportunity with the coolant being removed and changed. Here is a few links: Danny-

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

https://www.2carpros.com/articles/replace-thermostat

I heard to removed the thermostat it is very hard.

Danny again.

It is fairly simple, just two bolts! Since you replaced the injectors I know you can change the thermostat! My last response I included a thermostat replacement tutorial.

Yea, I changed out several thermostats so I am familiar with them. Just the location for this thermostat is a tad hard to get to.

Okay, let me know if you have an further questions and thanks for using 2CarPros. Danny-

Do I need to use any sealant?

Hello again.

The new thermostat comes with a O-Ring, so do not use any sealant. The Thermostat housing bolts are to be torqued to 105 inch LBS.

Also, the car only starts in neutral when I park for about ten minutes or so and when I try to start it in park it will not crank.

Hi there.

If the car does not crank in park but neutral only that sounds like the neutral safety switch. They can fall out of adjustment in time. Here is a link and a picture. I circled it in red. Danny-

https://www.2carpros.com/articles/how-a-neutral-safety-switch-works

I was reading online and it said this switch is inside of the transmission.

Hello Danny here.

My mistake, you are correct!
It is located on the transmission valve body manual valve shaft. A good time to test/check is when a transmission service is required. I always recommend dropping the transmission pan to change the filter however, people like the convenience of doing just a quick fluid exchange at quick lube places and it leaves the old dirty filter inside.

Every car I owned I always drop the pan and change the filter. Now once I drop the pan and remove the filter where do I go from there?

Hi again.
Here are a few testing procedures. Hope this helps. Danny-

https://www.2carpros.com/articles/how-a-neutral-safety-switch-works

Once I put the transmission pan back on is sealant needed?

Hi again.
No. Do not use sealant. Be sure all surfaces are clean to promote a good seal with the new gasket. Pan bolts are to be torqued to 17 Ft LBS. Danny-

I was driving home last night and the CEL came on and it was a code P0420 for the catalytic converter. I heard a loud noise under the hood and now it smells bad.

Hello again.

Sorry to hear you are having all these problems. Yes code P0420 is Catalyst System Efficiency Below Threshold Bank 1 . That is the right (passenger) side. Converters due wear out after time but, they mostly fail due to poor performance/mechanical failure/or contamination. I think it is possible this failure started with the fuel injector leakage. Having a misfire does massive damage by having raw fuel dumped into the exhaust system/catalytic converter. I saw this happen personally with my Chevrolet Silverado with a misfire with only 50,000 miles on a new converter. Usually prices can range from $100.00 to $2,000.00 depending on vehicle and availability. It can also be hard acquiring certain converters here in CA. Hope this helps.
Danny-

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

https://www.2carpros.com/articles/catalytic-converter-replacement