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Re: cold starting problems in the morning. Fuel
Hello. First place I would look in this case is fuel pressure. These trucks use 2 fuel pumps, 3 if it has dual fuel tanks.One low pressure supply pump in each tank (2 tank system) and one high pressure pump on the frame rail. I suspect from the symptoms you are describing that the low pressure feed pump may be your issue here. The reason being is the high pressure fuel pump isn't great at pulling fuel, only pushing it. So therefore the supply pump may be weak and slow to help out causing your slow starting. when checking this setup you may read good pressure because the secondary pump will put it there but it may be mostly air because it is cavitating, There is a schrader valve on the fuel injector frame rail that is your fuel pressure test port. Cycle the key and depress the valve core. It should be fuel only-not air. Careful here, it should be around 45 PSI pressure and I don't want you getting sprayed with fuel. Also don't try this with a hot engine. Have a rag handy to wipe up any excess fuel spillage. I have seen this happen many times in my years as a Ford tech. I doubt your problem is ignition related.
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I'd use a fuel pressure gage, check fuel pressure, key on, engine off, first thing in the morning, 60--66 psi, spider fuel system. If you have the spider fuel stem, that system is noted for problems.
There is a service bulletin for cold start-up problems, caused by fuel poppet valves sticking. Once you get it started, it runs fine the rest of the day. The poppet cleaning procedure shows to be a shop procedure.
faulty engine coolant temperature sensor cause no cold start problems.but make sure engine has good spark plugs and wires.clean fuel injectors and new fuel filter.during cold start up or morning start up engine need rich fuel mixture good spark to start.
Wow. where are you, and what is a chico? Anyway, by 1.4i, you mean it is a 1.4 liter injected? Does it have a cold start injector, like my toyota celica? (If it's not fuel injected, you may have a choke problem.) Kinda in the dark here. I had a chevy once that did the same thing, wouldn't start on first try. What I did was turn key and crank for a couple seconds, stop, then crank again-it always fired right up. Never figured that out, since it always worked. Try and see if it helps.
If the motor cranks than your battery and starter motor is ok. It sound like a fuel problem, does it do it on when cold, does it start ok once it has started and it has warmed up, if your vehicle is fuel injected than look into the cold start or even have your injectors serviced.
I'm assuming the engine cranks with the starter but does not start and run.
check the operation of the cold start injector. This is a separate fuel injector that injects fuel into the intake manifold to help richen up the mixture for cold starts. It operates on a timer that is linked to a sensor that measures engine coolant temperature. Once warm or the timer runs out, the cold start injector is turned off. Other things to check:
Fuel pressure too high (floods engine through cold start injector), engine coolant temp sensor or intake air temp sensor is stuck at full hot (doesn't allow enough fuel for cold starts), fuel injectors are leaking (floods engine with fuel).
1. Check your battery to make sure it is not rusted, leaking, and has a charge 2. Jump start your battery with another car, even if you believe the battery is good, this often times will still start your car. 3. If your engine is cold, and you have an older car, ensure to get your fuel lines to the engine flushed or have fuel injection service performed 4. The engine tends to warp the same way wood does during the extreme cold, do not be afraid to continue trying to warm up the engine by constant cranks with it is cold out. Your not going to hurt the car, the worse that could happen is too much fuel will enter the carborator and cause flooding in the system to occur. Wait 20 minutes if this happens and start to crank again 5. Bad spark plugs are a major reason why many cars take a very long time to start 6. Please have your spark plugs removed and exchanged for new ones. Over time, spark plugs become fowled and prevent the car from starting even thou you hear cranking!!!
Carburated vehicles ether have an automatic choke, or the very old ones, a hand choke. Yours has an automatic choke. The starting problem likely is a problem with the choke. The problem is almost certainly not the fuel pump.To set the automatic choke, push the accelerator to the floor, and RELEASE. Then start the engine just like you would a fuel injected vehicle. If this doesn't solve the problem, then the automatic choke needs to be repaired.
A very common problem on the 99 S10 is a leaky fuel pressure regulator in the intake plenum.What happens is when the truck sits for a few hours or more the regulator leaks all of the fuel in the fuel injection system into the intake air plenum. This does 2 things, 1 it has no fuel pressure when starting and 2 it floods the air intake with raw fuel. Sometimes if you turn the key on wait 3 seconds then turn key off then turn key back on and just turn key to crank starter for a split second and wait 3 seconds.do this 3 times to repressurize fuel system then crank to start(you will hear fuel pump buzz each time you do this.also you may have leaky fuel injectors. Try to crank engine with the gas pedel to the floor. This will tell the computer to stop spraying fuel trhough the injectors and it will start. Joe ASE Master Tech
this is a battry problem you can charge the battery long a nuff to start after motor is running but you have a dead seal i would recommend wall mart best price and warrenty if you replace the battery with there 2 yr warrenty with-in the 2 yrs you will never hafe to but a nother battery for the life of the vehicle////// if this is not your problem i would say your coil pack is cracked
remove the air filter housing from the throttle body, or if its mult-ported injection, remove the large air duct. Do this the night before. The next day, before cranking and having a spray can of carb. cleaner, spray a couple of shots of carb cleaner either into the large air duct, spray towards the engine, or if its single body injection, spray directly on to the throttle body.
Crank engine immediately, preferrably have some one else sitting in the car to start it after you spray.
If the car even tries to start, replace cold start relay.