Engine turns over but won't start

Recently my 95 Tacoma will not start. I have replaced the fuel filter, fuel pump, and starter. The engine will crank but won't run. When i turn the key it just continously cranks, and sometimes sounds like it wants to go but won't. I have bled the fuel lines, and ensured i have spark on my plugs. I really am stumped and wondering if anyone else has had this problem or can point me in the right direction.

 

Do you have an alarm? When you turn the key forward do you hear the fuel pump come on?

 

which motor?
make sure fuel filter is flowing right way and tight banjo bolts good
check battery/cables/voltage
also what large said
check plugs

basiclly just start from fuel tank and work towards motor, eliminating items..

dont forget muffler bearing adn blinker fluid

 

I have the 2.7L 4 cylinder motor. The fuel pump does come on and their is fuel flowing through the filter. I have put a new filter on in the last 6 months so that isn't the issue as well. I have checked the plugs, which are only 4 months old, and they are producing spark. i was thinking it might be the timing belt or maybe a blown head gasket. Just didn't know if that was a common issue with this year of truck.

 

I had a 92 w 22re timing chain popped an did the same thing ur saying. Not sure on ur motor but the 22re you can take the distributer off and stick ur finger in and hopefully you'll feel the chain on the sprocket and not just the sprocket. Check oil for head gasket failure

 

Also how was the truck running before? Fine? Or was it a slow problem then finally gave out? Before my chain broke it was making a loud banging sound for skipping links or jumping time or somethin when I cranked it up.. Also just because you replaced parts recently doesn't mean they're not the problem. Parts do fail for no apparent reason, and most times it's the things you've recently messed with that are the culprit. You could also remove the valve cover and get someone to turn the ignition while u look at the valve train. No movement = timing chain/belt failure most likely

 

My truck ran great before all of this. The only issue i had was that it was kind of hard to start in during cold weather. I would pump the gas a few times and she would start right up. Other than that no problems, and once i got it started for the day it would start fine the rest of the day.

 

Check oil and for belt/chain

 

Although that sounds like fuel delivery problems, any codes? If not... Another new filter, go in through intake with 24" extension and universal joint with 10 or 12 mm, can't remember, lot easier than other ways. Do that or/then check voltage at ignition coil, could also be problem, mabe getting power/spark but not enough. AND GO TO LOCAL PARTS STORE AND BUY HAYNES MANUAL!!!!!!!, truly an invaluable tool. Keep me posted. Want to know what the deal is.

 

Ignition Control Module, perhaps.
or Crank Position sensor, maybe.

 

I have an 04 tacoma. I had similar issues with mine. But mine would act up after being warmed up and trying to turn on again. It would crank and want to start but wouldn't . After a couple of weeks of diagnosing off and on I found a bad IAC valve. Not saying that's what yours is, but if you checked out all what you said it could be it.

 

After all day of ruling out problems we are still at a stand still. I have confirmed that it isn't the timing belt, put a new ignition coil in it and the spark is good, fuel pump still works, and there are no codes being thrown. It seems of fuel really bad so i'm thinking i may have flooded it. I'm going to let it rest tonight and clean the plugs tomorrow morning. try again. if not i'm going to run it to a shop and find out what the problem is. I'm putting a lot of time and money into this with no results.

 

ECM? That's what happened to mine.. if you know someone with the same truck swap ECM's out...

 

My question is if it was a sensor wouldn't it throw a code? I had it hooked up to a code reader today and didn't get any.

 

I would imagine so. If it was just a sensor, but mine never threw a code when my chain popped. Everything worked just there was no valve train movement to finish the combustion process. I'm bettering its something simple, and those are often the hardest things to find because you overlook them so easily. Prob a bad wire or something like that. Like I said be thorough from tank to motor. That's all the mechanic u take it to is going to do. Mechanics 101 process of elimination

 

Did you ever find a resolution? I was reading this post: http://www.toyotanation.com/forum/80-89-95-toyota-pickup-hilux/298739-1993-truck-wont-start-2.html

It gives a good overview of how the ignition/fuel injection systems work and how to troubleshoot them. There's some really good info there regarding how the FI is dependent on the ignition and how the ECU monitors for spark, etc. different year but still worth reading as I believe the ignition systems are the same.

 

Even with a partially obstructed fuel filter, it should start and idle. You might have problems with fuel starvation under heavy load (floored or up hills) but it should still idle. If you have spark, check the fuel injectors to make sure you're getting fuel. Either use a noid light or a stethoscope to make sure the injectors are firing. If they pulse once and only once, it could still be an ignition problem as the systems are interrelated. If they pulse continuously while cranking, you know they're working. You might want to disconnect all the injectors to do this test to avoid flooding the engine.

 

Are you getting fuel at the fuel rail? Have you checked compression? You can test resistance across the coils to see if they are in spec but if you're getting spark they are probably good. Pull timing cover to check the timing chain.

Hope you're able to figure it out without too much more trouble. Troubleshooting can get really frustrating

Edit: you can also put a screwdriver to your injectors and listen through it to see if your injectors are firing. You should hear clicking from them.

 

A faulty fuel pressure regulator could prevent sufficient pressure in the rail.

 

I think that's a bit extreme. If you have compression on all cylinders, the chain is fine. Plus, even cranking an engine with a broken chain makes such a different than normal sound, no one could miss it.