Mechanical noise when starting engine

Thanks for the video link. I was able to do the necessary work based on this video. The car is running great now. On cleaning the intake manifold the vent tubes were totally clogged. I bought a bore brush to clean them out along with brake cleaner. I never imagined so much carbon was present on the surfaces. Everything went well. Thanks again!

 

Thanks, I fixed that part of the problem following your advice. But the car has another problem. The car runs rough at times, clears up and gets rough again. I scanned for the DTC codes, and the following codes are showing from the scan: P0300, PO301, P0302, & PO441. I replaced all the spark plugs and ignition coils because the car has 299K miles. It never had a tune-up before. It still runs rough at times. I have to investigate the PO441 code. Do you have any suggestions for a remedy for this situation? Thanks again for your help.

 

Thanks. The video was right on.

 

Thanks. I scanned for the DTC codes, and the following codes are showing from the scan: P0300, PO301, P0302, & PO441. I replaced all the spark plugs and ignition coils because the car has 299K miles. It never had a tune-up before. It still runs rough. I have to investigate the PO441 code. Do you have any suggestions for a remedy for this situation? Thanks for your help.

 

No. The car has another problem. I scanned for the DTC codes, and the following codes are showing from the scan: P0300, PO301, P0302, & PO441. I replaced all the spark plugs and ignition coils because the car has 299K miles. It still runs rough. I have to investigate the PO441 code. Do you have any suggestions for a remedy for this situation? Thanks.

 

Since the cleaning a new problem has occurred. The #1 & #2 cylinders are misfiring. the DTC codes are: P0300, PO301, P0302, & PO441. I replaced all the spark plugs and ignition coils because the car has 299K miles. It never had a tune-up before. It still runs rough. I have to investigate the PO441 code. Do you have any suggestions for a remedy for this situation? Thanks.

 

I meant to get back to you sooner. I found a loose vac hose and securely connected it. The engine started right up and ran smoothe for about 3 minutes then shut down with a dashboard display read - CHECK HYBRID SYSTEM. The scanner reads a P3190 code. I cleared the DTC code and started the engine a second time. It runs for about 1 minute then shuts down again with the same DTC code and display readout. What can be wrong with it now? I don't have a clue. Thanks for your help again.

 

I have a full tank of gas. I cleaned the MAF with MAF cleaner. I reset the DTC with a hand scanner.

 

Should I replace the MAF with a new one? The only code showing is the P3190 code. What about the O2 sensor? Does that affect the P3190 reading? I could clean it or replace it. Other than those two items I can't figure else what to look for. Logically, there must be something else affecting the engine. Just short of a bad ECM.

 

Okay on that. I'll do that first. I'll let you know the result. Thanks.

 

I disconnected the 12v battery cable and waited 5 minutes before reconnecting it again. The engine started and ran for about 2 minutes then shutdown again with the same readout as before but with a strong smell of fuel. CHECK HYBRID SYSTEM. So there is something else in the system that is generating this trouble code. Could it have to do with the air/fuel ratio because of the smell of fuel? Or worse, is it the hybrid battery? What are your thoughts on this?