Toyspeed.org.nz Message Board

by **Flannelman** » Tue Sep 18, 2012 8:57 pm

So, a small hesitation started about 500km ago an has slowly gotten worse to the point of today it will no longer run.

Yesterday did some part swapping and changed AFM, plenum, and did various tests to see what was wrong. It was acting like lack of fuel but this morning the billows of black smoke said otherwise. Went to start after work and it wouldnt even idle. Touching the throttle results in instant engine stop.

Car is ae101, silvertop

Has anyone had similar issues? If so, what is the problem so it can be fixed.

by **Mr Revhead** » Tue Sep 18, 2012 9:16 pm

Obviously you have checked for codes?
Checked the AFM plug? I had that once after doing some work, had forgotten to plug in the AFM

by **matt dunn** » Tue Sep 18, 2012 9:54 pm

ECU faulty would be my guess.

by **Grrrrrrr!** » Tue Sep 18, 2012 10:00 pm

Probably going to go with Matt on this one, 20v ECUs are known for dying.

Also double check your vacuum hoses, if you left the signal line to the fuel pressure reg off it'd possibly behave a lot like you have described.

OMG so shiny! · by **Dell'Orto** » Tue Sep 18, 2012 10:01 pm

+3 on ECU

by **.:O4AGTZ:.** » Wed Sep 19, 2012 9:29 am

4th on ECU! Apparently they are known for melting caps, same as my GTZ had. Before ripping it open I would try a second hand one and see if there is any difference.

by **rollaholic** » Wed Sep 19, 2012 6:26 pm

check the AFM is plugged in properly before looking at the ECU though

by **matt dunn** » Wed Sep 19, 2012 8:11 pm

rollaholic wrote:check the AFM is plugged in properly before looking at the ECU though

If the ecu is not plugged in the car wont run

by **rollaholic** » Wed Sep 19, 2012 8:19 pm

matt dunn wrote:
rollaholic wrote:check the AFM is plugged in properly before looking at the ECU though

If the ecu is not plugged in the car wont run

thats true!

check the ECU is plugged in, then check the AFM is plugged in.

happy now

by **GOLDAE86** » Wed Sep 26, 2012 7:18 pm

Fuel filter ever been changed?

by **Flannelman** » Thu Oct 18, 2012 10:11 pm

Lost my internet for the month - that not even as half as shameful as what the problem was.

While the symptoms continued, the car spluttered its way to work with large collums of black smoke billowing behind. Pulling into work it died completely, it required towing home.

Once there an ecu was hired from santa to troubleshoot. Still no go...
All sensors were replaced. Still no go.

Back to basics.
Got spark? Yes. Altho it was weak so a new set of plugs were thrown in. Got fuel? Yes. Disconnected the fuel line from the rail, left key on and pushed the flap open on the AFM. Fuel gushed from the line.
Got compression? Yes. Hand over the sparkplug tubes and had it cranked over. While not a mechanical guage, the feeling of suck/blow was there.

Something so stupidly simple, I must of missed something. Checked it all again, including checking cam and ignition timing. All is good.

3 weeks later so I go back to thinking of the symptoms.

Black smoke... stumbling... If the fuel pump is failing, fuel pressure will be low then the fuel will be poorly atomised leading to black smoke!

To check fuel is going into the engine, a spare maniflold is setup up-side-down, injectors connected and fuel line hooked up. Cranked it over and nothing. NO FUEL. Ya hoo! Go to the fuel pump and tear it out, look inside and.... there was about a cupful of gas in the tank :oops:

Go and buy some gas and pour it in, prime the system and its running again.

Go for a quiet drive around the block and all is well.

However, in all serious I double checked the ecu... It was the cause of the original problem

by **allencr** » Sat Oct 20, 2012 6:51 am

Flannelman wrote:Black smoke... stumbling... If the fuel pump is failing, fuel pressure will be low then the fuel will be poorly atomised leading to black smoke!

Pretty much the exact opposite!
FPR and/or clogged return line.

Toyspeed.org.nz Message Board

So much fuel, car wont run

So much fuel, car wont run

Who is online