Question about 2009 Toyota Prius

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What are black pellets in my gasoline?

Engine light comes on. vehicle seems to have subtle idling issues. service tech found black pellets in gasoline.

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Either pump breaking down or fuel line breaking up

Posted on Feb 15, 2012


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Idles rough with blacksmoke. Also check engine light on!

Here is a long shot for you.
I had the same problem with a couple of vehicles.
It turned out to be an engine sensor, like a temperature sensor, but this sensor was hooked to the computer instead of the temperature gauge.
The sensors were used on many cars, and in fact, were identical for many vehicles about the time of yours.
When defective, they told the computer it was -20 degrees outside, so the computer dumped gasoline into the engine like the old hand-choke would do.
That is the source of the black smoke and the engine light being on.
God bless your efforts.

Oct 15, 2015 | 1994 Toyota Pickup

1 Answer

89 cutlass cierra crank but wont start when wet out unless gas pedal is pushed

This should be a drive by wire vehicle meaning it has a cable for the throttle body. First thing would be to see if any error codes can be pulled up (most parts stores will do that for free.) Drive by wire versus the late model that use electronic control for the idle have a IAC or idle air control which when first started controls the idle air intake--all air is run by it to idle the vehicle when cold--

Usual symptoms are rather high idle when cold engine or even idle and RPM jumping up and down and stalling when cold.

Another way if idle does drop when cold is tapping the gas--engine will still run until hot. Means not usually a fuel pump issue.

You could also have if the vehicle is fuel injected a dirty Mass air flow sensor, a throttle position sensor, etc.

These can be if the vehicle has them cleaned using a special zero residue spray cleaner.

First have it scanned to see what if any errors it shows--the computer.

Dec 17, 2012 | 1989 Oldsmobile Cutlass Ciera

2 Answers

My 2005 Mitsubishi oz rally feels like it wants to stall while I'm driving. The service engine light has not come on. It has only stalled once while at a complete stop.

I checked for Technical Service Bulletins (TSB's) and Recalls for your vehicle, but I found no TSB's related to your problem and the only Recall that has been issued for your vehicle is for a problem with the headlamps.

I can only offer 2 pieces of advice at this point:
1. If it feels like the engine RPM is not correct, i.e too slow or erratic when you are coming to a stop, I would be taking a hard look at the Idle Air Control Solenoid (IAC) These can fail and never set a code.

2. You may want to have your engine computer scanned with a scanner that can check "Vehicle Specific Codes" There may be codes or pending codes stored in your engine control module that have not yet or cannot turn on the Check Engine light. Some of these types of codes are vehicle specific and most generic OBD code readers can't even see them. I have many times found several codes stored without the Check Engine light being on.

Post a comment to let me know how this turns out, or if you have any related questions.

Mar 09, 2011 | 2005 Mitsubishi Lancer

1 Answer

Why would the car start but cuts right back off?

Probably your security system:
PassKey I, and II
Similar to the VATS system, these vehicles also used a pellet key. You can identify this system by looking at the key. It has a black resistor pellet with a thin metal edge running along the key. The system enables the starter, but shuts down the injectors after initial startup. So the vehicle would start, then die. This system has a "relearn" feature. It was used on these vehicles
Riviera/Reatta 90-01

Is the security light coming on? Are you using the factory key with pellet inside? Do you have another factory key you can try?

Nov 14, 2010 | 1992 Buick Riviera

1 Answer


the problem will be faulty injector tips squirting and not atomizing take it to an accredited diesel specialist shop and have the new tips fitted and the injectors recalibrated

Jul 18, 2017 | 2003 Volkswagen Jetta TDI

1 Answer

91 firebird security light comes on and vehicle wont start. happens when engine is warm or humidity is high... seems to start about every 100th time i turn the key. pellet in the key seems fine, has...

i have a 1994 and had the same problem i found out that the egnition switch was loose and not reading the key right im not sure if that will help you but give it a shot might want to get some one elce to look at it

Oct 28, 2009 | 1991 Pontiac Firebird

1 Answer

91 mercury tracer check engine light after starter replacement

when you disconnect the battery.when changing the lost computer memory.the computer is going through relearning its effects idling.should clear up after driving around a day or two.if it keep stalling take it to the ford dealership to relearn to idle.

Jun 12, 2009 | 1991 Mercury Tracer

2 Answers

2002 Ford Taurus SEL, DOHC Misfiring

Disconnect the battery completely, try turning the key with the battery disconnected. Put the battery back together. The check engine light should be off now..

Jan 31, 2009 | 2002 Ford Taurus

1 Answer

Service engine light ---on and off, and on and off

I disconnected the line and blew them out. I found nothing in the lines. There were no leaks or clogs so I replaced the power steering pump, reconnected the lines, filled with fluid and primed. Seems to be as good as new now. Did not mind the work although tight in some spots but the price for a new pump, over $200.

Jan 02, 2009 | 2002 Suzuki XL-7

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