Wednesday 26 October 2011

Hesitation on Acceleration?

when i first start my truck its a slow start, when the engine is cold its like its gonna stall but then it picks up and idles fine, now if i press the gas it almost stalls so then i leave it for about a minute then press the gas and it will start accelerating now i can drive it, it has a loss of power and struggles up hills can only reach a maximum of 80km, im not sure what it is but these is what i have gotten done so far:



Fuel Filter

Fuel Pump

Ignition coil ( engine code said coil #10)

oil change

fuel injector flush (also added a bottle to the gas)

MAF sensor

checked for leaks by mechanic and nothing!



and nothing has fixed the problem, the van did sit for 1 year with no use and ran good the first day then the next day died!



any help would be greatly appreciated! im going to change the spark plugs tomorrow to see if that could fix it!



P0102 - mass or volume air flow a circuit low

P0360- ignition coil j primary/ secondary circuit

P1401- diff pres feedback egr circ high input

P1130- lack of h02s11 switch ( fuel trim at limit)

P1131- lack of h02s11 switch ( sens indicates lean)

P1150- lack of h02s11 ( fuel trim at limit)

P1151- lack of ho2s21 switch ( sens indicates lean)

P0171- system too lean bank 1

P0174 - system too lean bank 2Hesitation on Acceleration?it's a manual transmission? it's probally your clutch
Hesitation on Acceleration?
i can tell you that it is most likely the spark plugs as the gaps may be off or wrong or they could be full of **** or wet even, before you put the spark pugs in give the points a check using a feeler gauge and adjust it to the manufactures gap specs.







hope this helps
Hesitation on Acceleration?
clogged fuel filter or pump is bad, bad egr rarly or almost bad o2 sensor
code 10 in most codes is the computer is bad,
Could be vacuum advance on distributor not working right or not at all. Running lean could be oxygen sensor bad, allowing for lean mixture. It should maintain 15 to 1 ratio, (15 air to 1 fuel). Oxy sensors read oxygen in exhaust and if too much gas (rich) they cut back on gas, or if not enough gas (lean) they add gas, so it is constantly adjusting, to maintain the 15 to 1 ratio. If they go bad, they will not give out any signal, or a rich signal or a lean signal, and then the computer will add or decrease gas according to the reading. It could be telling the computer to run lean.



The throttle valve position switch tells the computer how far open the throttle valve is and so the computer adds gas. Again, this could be bad or needs adjusting, and this will send the wrong signal and computer will respond, giving wrong amount of gas.



When cold, the coolant sensor tells the computer it is cold, and the computer keeps most other sensors from working, and this will then make the vehicle run %26quot;rich%26quot; to make the vehicle run when cold, since gas doesn't burn to well when cold. (More is needed). Once the temperature is warmed up, the coolant sensor tells the computer to put in the others and then the vehicle will run by those others, running lower rpm and maintaining 15 to 1 ratio. So a bad coolant sensor could cause the computer to keep the sensors 'In%26quot; when cold, and not give enough gas, so it stumbles. Like having a choke Open on a carburetor when it should be closed. Same effect.



So you see, these are a few of the possibilities, and there are more.
its a vacuum leak you cannot tell by looking at the hoses or gaskets a smoke machine has to be used you will be surprised how many vacuum leaks you have.thats the lean codes for po 102 make sure you have the right air filter for it the wrong air filter will not direct the airflow right and it will set this code po 1401 is the dpfe sensor and silicone hoses they always go out all the o2 codes will correct itself when the vacuum leaks are fixed po 360 if the coil has been replaced by a motorcraft coil dont use aftermarket coils the resistance is different if this is done then the plug is bad.You can use a simple 12 volt test light to check this. one side should have power all the time when the key ignition is on the other side should pulse ground.If all that is good then its the pcm.