Fuel delivery problems

[Ian]

Problem: I've been driving with my check engine light on for a month or so. The car has been sputtering and jerking on acceleration. I thought it was a knock sensor pulling it back, but I found out from the toyota dealer that it may be the fuel delivery system.

Toyota said it may be the fuel pump, fuel filter and/or fuel lines from the filter to the fuel rails. They could not determine though because all of those parts are aftermarket and they won't work on non OEM parts. The fuel pump is from URD, the filter and lines from Jim's fuel kit.

So, I'm having it checked out by my mechanic tomorrow to see exactly what it is. Has anyone else had fuel delivery problems that led to your car jerking?

[Turbosolara]

dont totally trust what dealer told you, especially when you have some aftermarket parts on your car. they will just blame on all of the faults to the aftermarket parts.

did you pull out the error code? what is it?

[Ian]

The codes pulled were: P0300, P0302, P0304 & P0174.

[Akfahad]

most of my jerky acceleration problems have been because of air. Either the MAF gets a bad reading or a TPS, in my case. However, my problems are usually short lived, knock on wood.

[Turbosolara]

search on the google and tell me what are those code for. obdii codes are universal

[campfire9]

code readout are as follows: PO174=System too lean (air/fuel lean malfunction, bank 2). PO300=Random or Multiple Cylinder Misfire Detected: Ignition system malfunction - Injector malfunction - Incorrect fuel line pressure - EGR malfunction - Incorrect compression pressure - Incorrect valve clearance - Incorrect valve timing - MAP or MAF sensor malfunction - ECT sensor malfunction. PO302=Cylinder no.2 Misfire Detected ( Same as PO300)PO304=Cylinder no. 4 Misfire Detected ( Same as PO300)

Hope this helps.

[Ian]

it helps, and it makes me feel like "wtf!"

[Vampire]

I had a very similar problem without the specific cylinder codes. It ended up being a clogged injector. Funny thing is that that really isn't the first thing that you would think of. I did have the advantage of having a fuel pressure gauge and spare injectors to use to help trouble shoot. Not to mention my wife's Camry as a donor part source to rule out other issues. Good Luck.

[Turbosolara]

yeah sometimes just one code will trigger another code and go on. what engine management do you have?

[Akfahad]

it helps, and it makes me feel like "wtf!"

^^^Haha, I know...that's what I said after reading the description of the codes. The clogged injector does make sense, might as well have the mechanic look at that too, but the misfiring on the cyclinders is what worries me. But still could be nothing, codes thrown because of one.

[Ian]

yeah sometimes just one code will trigger another code and go on. what engine management do you have?

I don't. I just bought the URD system as far as the FTC-1 and the AFR sensor calibrator. The issue, as has always been the case, is finding a shop to do the install. I found one that does installs of Split Second products, but they do them on very high performance Vipers. So, I don't know for certain if they'll take the time to install on my itty bitty toyota.

O.K., I have to sound off - Installation has been my frustration throughout the modification process. I don't have the time to do it myself, so I call shops all around for certain assistance and no one can do it. If they can, then the Solara would be the first one they've ever done. Of course, that could mean trouble because you are then the guinea pig. -sigh- O.K. I'm done. I'll let everyone know what happens after I get this car checked out again.

[Ian]

Had my mechanic check it out. They conclude that my car is running rich and consequently, my catalytic converter is breaking down. They noted the sulfer smell when the car has warmed up, also the fact that it sputters when you mash on the gas pedal, but not so much if you ease on the gas pedal.

That makes sense to me, and therefore I will expect, and hope, that after I get this mofo tuned that the problem will go away for good. I'm sure I'll post after it is tuned just to let everyone know how it turned out. Thanks for all the input.

[Turbosolara]

the engine misfire because your spark plug is bad, that was caused by running rich. This happened to me before. just replace them with denso iridium ik22 spark plugs and you shall see a big improvement.

dead catalytic convertor does not really effect performance.

where are you locate at? maybe some other members here can help you find a tuner to install the management unit for you.

[Paladin06Greg]

All of your problems are related to improper fuel trims.

I've had them all before.

[Vampire]

If your cat is clogged, that can cause you to run rich because among other things it creates more backpressure through the EGR. I don't quite get what breakdown means by the mechanic. I assume it has lost it's abilty to function like it should? Anyway, if the cat is clogged, let's hope it's due to age or something not related to the motor because a clogged cat is often a sign of something else happening. Like oil burning ...

Had my mechanic check it out. They conclude that my car is running rich and consequently, my catalytic converter is breaking down. They noted the sulfer smell when the car has warmed up, also the fact that it sputters when you mash on the gas pedal, but not so much if you ease on the gas pedal.

That makes sense to me, and therefore I will expect, and hope, that after I get this mofo tuned that the problem will go away for good. I'm sure I'll post after it is tuned just to let everyone know how it turned out. Thanks for all the input.