1999 Alero 3.4 Has fuel pressure but will not run. If you add fuel via trottle body (injector cleaner) it will run (although roughly) how can i check for injector pulse without removing plenum?
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Remove the vacuum line from the fuel pressure regulator and inspect for fuel leaking into the vacuum line. There should be NO fuel.
The regulator is located on the upper intake manifold and is easily accessible.
Replace the fuel pressure regulator in the intake plenum. This is the No. 1 problem for hard starting with the 4.3 L engine. It leaks fuel and loses fuel pressure when sitting for a few hours. You can try to cycle starter for a split second without cranking wait 3 seconds the turn key OFF then repete 3 times then tryto start. This will build up lossed fuel pressure and verify leaky fuel pressure regulator. Joe ASE Master Tech
there is no such reset switch located in the car.
First turn your key on and listen for the fuel pump to pressurize the lines. Then check to see if the fuel is leaking from the filter. If it is you may have got the connection wrong. If thats the case your engine is not getting the proper fuel pressure to run. Hence its sucking air. If that does not work you might have a bad fuel pressure regulator sensor that is bad. Its located by the TBI. Reference a Haynes manual for replacement. also if you did not fill the new filter with fuel then you have air in you system and engine will not run. so try taking it off and filling it with fuel and then replace it. -------------------------------------- turning ignition on removes air from fuel lines and primes the fuel system. filling fuel filter with fuel is irrelevent, as lines need to be clear of fuel upon installation. leave ignition on after installation for roughly 30 seconds-one minute. this will prime the fuel lines and remove air and most water from the system. if problem continues, fuel injectors. this is a common problem in 90-92 camaros. if cannot start car, you'll need to replace every injector, as it's not cost-effective to diagnose every injector. roughly 300 dollars in quality parts, roughly 4 man hours of labor. if rough start that requires push on accelerator (try this), run the car with fuel injector cleaner. this should salvage you injectors. if this helps proformance, starting, then for the next 3-4 full tanks of gas, add stp injection cleaner for every tank of gas. be careful, as this does not restore your injectors, but it helps clear away deposits which are common in multi port injectors.
It sounds like an injector problem....try filling the tank, and adding a bottle of fuel injector cleaner...that's the least expensive way, I would try that first. You may have to do this a couple of time if their real dirty.
It could be a couple of things.
1) Check to make sure the wires are in the correct firing order.
2) Check to make sure th plugs are still good, including the gap.
If these don't work than you should probably have a mechanic look at it in person.
most likely idle air control sensor or low engine coolant I know sounds funny but IAC uses coolant to regulate idle. Idle air control valve or throttle body positioning sensor.
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