I just bought this 95 Accord not to long ago and it cranks but does not start. From what I understand the people before me had pretty much replaced every relay, fuse, distributor, spark plugs, and ecu. So I made sure there was spark and fuel. Once I knew they were good, I took the injectors out and cleaned them, which they was full of carbon build up, and they do spray fuel. The crazy thing is that when I turned it over, it fired with the injectors pulled out. But with the injectors put in, it does not start. So I have no idea what to do. Any help is appreciated. Thanks

Also whenever I got the car, the camshaft bolt was loose and the crankshaft key was out.

 

Since the cam pulley was loose and the crankshaft key was missing, did you check that the timing belt is in time?

 

Yes I checked it multiple times, over and over again. And it looked perfect if not maybe a tooth off. But one thing that concerns me is when I'm cranking it, to me sounds like it has a thump thump sound. Then sometimes it sounds normal. Today for the first time actually popped off with the injectors in. But one injector was squirting out fuel from a bad gasket. I know it fired because the rpm jumped up and down which never happened before. So today I have took the injectors, injector rail, and intake out. And whenever I removed the plate that was under the injectors, I saw that every single port was completely clogged with carbon buildup. Tomorrow I'm going to remove the intake manifold and clean everything while I wait on a gasket kit.

 

That carbon buildup is in the EGR passages. Plugged EGR ports will cause the engine to have a slight stumble at ~2200 rpm, but won't cause your car to not start. Cleaning them out is a good idea, but I don't think it will cure your no start.

I'd recommend doing a compression test on each cylinder, because the missing key on the crankwhaft could have caused the pistons to hit the valves. A compression test will help identify a dead cylinder. A leakdown test is another test that can help differentiate between leaking exhaust, intake, or piston rings.

 

Yeah but the injectors were the same way with the carbon build up. What if it is like that inside the cylinder and valves are clogged up or something. It does have 248,000 miles on it.

 

cam bolt loose, crank key out, I would definitely fix that issue before looking anywhere else, you got to make sure that engine is properly timed, top and bottom ,
about compression chk, one dead cylinder won't keep car from starting, it would cause a misfire , if compression is low, put a bit of oil in spark plugs holes and recheck compression if it comes up
most likely could be a ring issue if it does not valve(s) issue

 

I already put the key back and tightened the bolt. That's the first thing I did. Without the key, it wouldn't turn the motor over.

 

Did you double chk your cam timing? All ok?

 

I'm going to go ahead and replace the head gasket seeing as though everything else is off and because it has a lot of miles.

 

Yeah.