What’s wrong with my Toyota?

[sam999999]

2004 toyota trunda will not accelerate. Truck sat for a month and required a jump start. Truck was fine when in use last till it sat for a month and battery went dead.

[carriedi]

computer in limp mode? restricted exhaust, contaminated and/or clogged fuel filter, bad fuel pump, bad fuel pressure regulator...

if you have any codes active or codes stored in memory, look at those things first.

there are many things that can affect your engine. You should probably start off by scanning the computer and see what the engine is doing. (check for any codes first) How does your oxygen sensor look? Are the fuel trims looking normal. if your fuel trims show that they are adding fuel then you need to look at your fuel supply side. (Make sure the coolant temp sensor is working normal)

if the fuel trims look ok, check your air flow and/or vacuum. checking for restricted exhaust.

does it start up normally? does it run in idle normally? do you mean that it takes a very long time to get up to highway speed or it won't get up to highway speed? Do you mean it won't accelerate from a stop or won't accelerate when you speed up from highway speeds? It's not reving too high from the trans slipping right? You're talking about the engine rpm's labor when you step on the throttle right? Does miss or run badly too?

You may need to drive with a fuel pressure gauge on your truck to see what the fuel is doing. Have you done anything to see what the problem might be?

Is your battery good? did you get a new battery? did you charge your battery up? are you getting 13.8 to 14.2 volts to the battery when the engine is running? A low battery can make the computer see all the sensors wrong because it does not have enough voltage to be accurate.

[sam999999]

re: 2004 trunda problem was 2 blown fuses under hood. Its a result of jumping auto without first letting battery charge. Problem was that high voltage from trundra alt. was not able to be absorbed into the battery due to high resistance of the battery. some batterys that are dead exhibit high resistance when first being charged. This battery happened to be a mono block type {liquid free). Most dead batterys exhibit low resistance when first being charged. So if battery had been charged first before starting this trunda this problem would have not happen.

[baja]

Anybody change their water pump? I am going to do mine, any help would be appreciative.
Thank you

[carriedi]

be careful...

[Red6173]

We got the battery and alternator checked out. And their both checking out good. But yet when we drive the car the battery light still comes on every once in a while and we then lose power to accelerate. Like it’s hard to accelerate to 40. We stop the car and pull over and shut it off. And it starts right back up just fine. Can someone please help me? I need answer.

[carriedi]

there are only a few reasons that the battery light will come on. The alternator stops charging the battery or the engine rpm is too low for the alternator to charge the battery with the engine on and accessories being used. the alternator light works on a voltage differential. when the alternator is charging the light has good voltage on both sides of the circuit. So, no current flow. when the alternator doesn't charge enough the voltage drops on the alternator side and the voltage differential will let current to flow and start to turn on the light. The bigger the differential the brighter the light comes on.

A year, model and engine size would help looking for any specific errors.

If the system voltage gets too low it will affect all the electrical systems. Drop in voltage will affect the cars computer systems if the voltage gets below about ten and a half volts. The ignition coil could also be affected reducing the spark plug voltage to the cylinders.

because it is intermittent it may be difficult to find the problem. a bad battery connection, a bad ignition switch, a bad alternator connection, an intermittently bad alternator regulator... A shop would need to have the condition happen to them while they were checking it out to see what is happening to the charging system. If the ignition coil is shorting out it could take power away from the engine and reduce the idle so that at idle the light might come on.

if your alternator has a decoupling pulley, the pulley could be shipping. (but that would be rare. most of the time the either lock up or make noise)

no specific answer for you. it's gonna take some diagnosing to figure out what's happening on your car. Having a scanner that can graph the engine system could watch the ignition voltage while you are driving and when the condition happens see what the battery voltage is. Pulling over to where it's safe, while it is not running normal, check the alternator output, the engine rpm, check the battery connections at the battery terminals.