I need help diagnosing 2.3 problems
Hi. I have a 2003 mazda b2300 with 125,000 miles. I accelerated after stopping at a stop sign and all of a sudden complete loss of power. Engine idle is terrible like 500 rpm and the engine will die within 20 seconds. There is little to no throttle response. If i push the gas pedal all the way down it will eventually get power and rev up but only for a few seconds before dropping again. I can start it like normal, it will rev up like 2500 rpms like normal, and then after a few seconds it drops to around 500 rpm with very inconsistent/rough idle. The engine light came on after about a minute and gave one code p2195. A google search found that a few people had a plug fall out of their intake, causing a vacuum leak, and gave symptoms similar to mine. So I checked my plug (right behind the power steering pump) and it was fine. I tried checking for vacuum leaks and couldn't find anything with the carb cleaner check. I replaced the fuel filter and the vacuum hoses going to the IMRC because the hoses were starting to disintegrate.
It may be worth mentioning that I only have about 50 miles on my latest oil change, but I don't think that has anything to do with it.
So here I have some questions if anybody can give help/advice:
Right now I'm thinking I will take off the intake manifold and check it really good for cracks/leaks. If I do this is there any other maintenance I should do while I have the intake off? Do I need to probably replace the gaskets while I have it off? I will also replace the PCV valve and check that hose really good while I have the intake off. I think I should also clean the MAF sensor but not sure where exactly that is? I have very limited experience working on cars/engines but I would say I am very mechanically inclined (i'm a young farmer and I do all the maintenance and most repairs on our farm equipment,tractors, combines, etc.). I will also clean the throttle body. I've never even seen the inside of large engine before but there is a lot of gunk built up inside the throttle body, is that normal?
I'm also questioning if this could be a bad egr system. Is there a way I can test the egr valve? I'm not even sure where it is but I suspect it is probably attached to the back of the intake manifold near the firewall.
I pulled the spark plugs to check them out and I think I ruined the plug wires when I pulled them out. I'm going to replace the plugs and wires. Those suckers don't come out easy. Now when I ohm them I can't get a reading on any one of the wires using two different multi-meters. shouldn't I be able to ohm them to see if they are good? I can't believe I ruined all four just in the process of pulling them out. I yanked the first one pretty good but I was careful with the other three using some long-reach needle nose pliers. I also took off the coil and tried ohming through from each of the three studs where it plugs in to each of the connectors for the plug wires and I didn't get a reading. I thought I probably should but I can't find any info on testing the coil. Maybe my problem is a bad coil? But I didn't get an engine code for any misfires?
I really want to make the most of it while I have the intake manifold off so if you have any input of what I should do please advise those of you that know! Would also be helpful if there are any tutorials/advice on taking off the intake manifold. Looks like it should be fairly easy to do if I can get to all the bolts.