Question about 1990 Dodge Dakota

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I need help, the fuel injectors on the TB are not getting any power. Can you tell me where I should start looking for the issue?

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The first thing to look for is any fuse/relay blown in the fuse/relay panel. (you never did say weather you had power to everything else on the engine) If you do not have power to aything else then look at the (auto shutdown relay) for the problem. Hope this will help you.

Posted on May 27, 2010


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Car turns over. fule gets to injectors. no codes. but will no start

Will it start with Starting Fluid? Or just turn over?
If it is getting fuel to the injector rail, at decent pressure, Then it is computer or ignition. You need to verify spark. If you have a blue spark, Then the injectors may not be firing, or vice versa.
If injectors or plugs, suspect crank or cam sensor.
Another possibility is a huge vacuum leak. TB base, PCV hose, or Brakeline.

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99 s10 gets fuel to rail but wont start

If you have checked the fuse for the injectors and when you turn the key it sounds like it wants to start then you could try running fuel injector cleaner through the system but better yet determine which injectors are plugged and replace them. Best yet, replace all the injectors it is best for both the vehicle and the environment (emissions) to have them at the same age. With it not starting you can be pretty sure injector number one needs replacing. By injector number one I mean the injector that supplies the first cylinder with fuel to fire. To determine which is injector number one you need the firing order for your vehicle.

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First off, the AA mechanic that sprayed fuel into your intake to determine it is a fuel issue ONLY has determined that! It is a fuel issue! Fuel is delivered to the engine by your pump(s), then it is delivered into the combustion chambers by the injectors. So, what you need to do first is a test your fuel pressure! Most vehicles has a fuel check valve so you can hook a fuel pump tester up to see what the pressure is, some don't and you have to break into the fuel line to hook up the tester. If your getting good pressure 45-60lbs from the pump(s) then the problem is not the pump(s) it is going to be a issue with the injectors.
Now, I'm not saying the injectors are bad, they would have to be tested with a noid light to make sure they are getting a signal to fire. You have to go through a process of elimination to determine exactly what the issue is, it very well could be a pump issue or an electrical issue. Even if there is no fuel pressure from the pump, you then need to check to make sure the pump(s) is getting power. Hope this helps you. Oh, and as far as the fuel pumps, you are going to have 1 in the fuel tank(s). Follow the fuel line from there and if it has another pump you will find it. I'm not familiar with this model so I can't say for sure if it does have 2 pumps or not.

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1990 Jeep Wrangler 2.5l idles rough/ black smoke/ fuel odor

You could pay a garage to diagnose the problem cheaper than throwing more parts at it.
The problems may be connected or they may be different issues.
Yes I would change the oil and filter, but first I would make sure the fuel system is not dumping too much fuel into the cylinders.
The O2 sensor helps the computer decide on how much fuel the engine needs, along with the other sensors. And you said you have already replaced the O2 sensor.
A mechanic would take a scanner and "read" the sensors and look for something out of normal range.
The fuel pump and fuel filter are off the list as far as causing a rich mixture goes.
I would start with the rich mixture and then see if fixing that issue takes care of the no start when hot issue.
Change the oil and filter first, and see if the injector is on too much.
You can watch the spray and tell - at idle it should be very light.
Also look at the engine temp - is it warming up to normal 195 degrees? Can you tell if the fuel pressure regulator is blown and pouring fuel into the throttle body ?
Without a scanner its going to be more difficult, but not impossible to diagnose.
Let me know what you find out.

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1 Answer

I have an 1988 chev 350 5.7 liter , my injectors will not work, there is fuel getting to the tbi, but somthing is telling them not to open, it was running bad now no fuel, i unpluged the map sensor. and...

you should have over 9psi while cranking with injectors working to start. if there is not enough presure it will not start. The computer tells the injectors to open, it actually controls the ground side of the injectors with power side always hot. the computer NEEDs the map sensor or it will not start, it needs crank and cam location sensors from the distributor, the TPS, etc. Plug all sensors in, check fuel presure, clear codes and start over, checking codes to determine what isn't working.

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Check the electric stop on the injector pump is working.

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