Van will not start.. but will start and run if... squirt brake clean into throttle body. have 10psi fuel pressure coolant temp sensor 2120 ohms replaced single fuel injector due to dripping fuel and replaced regulator. still wont start hooked up vac gauge to intake 15 in vac untill try to accelerate then it drops. to 10in acts like its starving for fuel and wont run squirt brake clean while accel. and it runs accels fine. got any solutions thanks carpenters garage.
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Two places to start. First clean the throttle body/carb. Brake clean and a tooth brush. Clean inside as best and deep as you can, clean the back of the throttle plate and were it seats the most. It will take a few seconds, start the car up and spray the cleaner in the throttle as you rev it up. Then after that, I would replace the engine coolant sensor.
loosen fuel lines at throttle body when turning key to on possion , careful not to spill gas all over engine, do you hear fuel pump running and try to put at least 4-5 gallions of fuel, you could try a (LITTLE ) shot of starting fluid ?good luck hope this helps.
you forgot the coolant temp sensor, this regulates how much fuel it needs according to temp outside, it can be read with a scan tool, it costs approx 20.00 and make sure they sell you the right one,you don't want the temp sender....You want coolant temp sensor ! In layman terms it's like a choke...more fuel when cold and less fuel when warm.
depends how long its been sitting if starts with easy start then its a fuel pump problem like the fuel has gone bad or the pump has gummed itself up ,so take it out and check that the pump still works as i suspect that its gummed up and good clean will cure it for you
There was a recall on the throttle body blade on the 4.3 a few years back for the throttle body to stick in the close position. Yours being 9 years old makes me think that there not going to do anything for it but give you the solution to the sticky throttle blade.
The solution was to change the blade. You can try cleaning the throttle body blade by spraying throttle body cleaner in to the barrel of the throttle body. If you look down, you'll see the carbon build up and it may just need and good cleaning.
If that does not work, you can buy a new Throttle body blade which is only held on by two screws on the throttle blade shaft.
Start with cleaning the blade and throttle body with throttle body cleaner. Just follow the instruction and you'll be fine.
Keep me posted and good luck.
underneth the intake manold is were your fuel injector poppet nozzles are, more than likely the fuel line hose that goes thru the back of the intake is split and leaking fuel underneth the intake manifold if you check the fuel pressure you will find that the fuel pressure will drop down to 0 psi as soon as the fuel pump shuts off and it should hold pressure