Question about 2000 Triumph TT 600

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After fitting a new relay for the ECU/ fuel pump on my Triumph TT600....the fuel injection will not will start, when, drip feeding fuel into no other problems, and no faults recorded on the ECU....what can the problem be?

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This 2000 triumph tt600 wont start it does turn over it was runing last riding season it have new battery fresh oil im thinking the fuel iinjector need cleaning im at the right path to get it runing

Posted on Mar 27, 2011

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Triumph speed four running on 3 cylinders and cutting out. Is this ecu problem

Hi, Claire don't think so the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. The gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
Running on 2 cylinders Sports Model Range Forums Messageboard Triumph...
Help another t509 speed triple cutting out

Apr 29, 2016 | Triumph Motorcycles

2 Answers

Where is the fuel injector relay located?


Jun 20, 2015 | 1994 Geo Prizm

1 Answer

My 2003 triumph tt600 shuts off when the temp reaches 220F it won't restart till it cools below 190F then when it reaches 220 it shuts off again it seems like I hear a little click as it shuts off

That is programed into your ECU and is a safety to stop engine damage. I would be checking the cooling system and thermostat for correct operation as 190F is the correct operation temperature.

Apr 14, 2015 | 2003 Triumph TT 600

1 Answer

89 jeep Cherokee Laredo 4.0 auto. Engine keeps

this is by DESIGN (try a new relay?) very old( RENIX POS) jeep.
the ECU decides if car is safe to drive, not you.
the logic works like this to prevent TV style crash and BURN.
  • crank and the relay closes
  • if the throttle is not W.OT(wide open throttle) it injects.
  • if after a few seconds, there is no spark (yes,,it can see it) it keeps injection and it runs,. if spark is weak it kills ALL injection
  • the tachometer line is monitor for spark happening, to do that.
the 2nd bad news is there are no scan tools for stinkn RENIX
nor CEL flash codes (DTC) like all other cars made that year. USA.
double bad that.
so you can not see if the ECU is seeing loss of critical sensor.

not fun, at all working on any POS RENIX box.
Renix is the french fuel injection system. on this car.
AMC , brain child.

Sep 14, 2014 | 1989 Jeep Cherokee

1 Answer

I have a 1992 Honda civic lx with a 1.5 four cylinder, and Ive replaced the ignition switch the fuel pump relay and the fueled pump itself however, the fuel pump still doesn't prime when I turn the key...

no start , crank perfectly
so , got spark?
the ECU has programming (ROM) and in fact kills all fueling with no spark , (even if it thinks there is no spark, even if spark is ok)
all ECU use a way to read back spark quality, (ALL){LAWS}
how honda does it in code, i don't know , see C R O M E forum)
turn the key over means nothing to me.?? sorry, it doent/
try saying what postion? cranking? or just keyon.
now some more EFI rules.
The EFI (some) do not activate the pump relay until cranking.
some do just key on for 3 seconds, read the FSM, its free.
need a link to the free manual? read the ECU logic on that.?
and prime has a special meaning, it means purge air,
its not for fuel. some system send a fast prime pulse. to clear air from the pressure lines, this plus does not inject.
that is how EFI works,

the flow
1: key on, ECU sends prime pulse, (air purge)
2: some ecu, run pump for 3 seconds, and pressure hits 35psi? RTM.
3: all ecu activate pump cranking and running.
4: now check pressure. !" 36 psi FSM stated spec"
5: now crank, if the ECU sees no spark errors, it injects
6: if the ECU sees WOT. it stops injection to clear a flood, cranking.
those rules cover most ECU made.

honda this year has a special feature called,
Fuel Cut-Off Control'
if this messes up, it i can cut fuel
does this help?
even better is this site, (has all the facts..)

Oct 07, 2013 | 1992 Honda Civic

2 Answers

2009 triumph thruxton still popping even with power commander installed with d&d exhaust

Yes. take it to a Triumph dealer and get them to install the correct ECU map. They are very good at helping in this way. You didn't really need a power commander as Triumph fit a reprogrammable ECU for just this reason.

Mar 31, 2012 | 2002 Triumph Bonneville America

1 Answer

Bad Fuel Pump?

Yes, you can remove the outlet pipe from the fuel pump and see if there is a flow of gas as you switch on the ignition taking care to have a container to catch the gas from the outlet pipe.
If there's no flow of fuel....means either its dead or may have some obstraction at the inlet of the pump.
Hope this helps!

Feb 08, 2010 | 2002 Triumph TT 600

1 Answer


No, power to two of the terminals, the other one is grounded.

Jul 20, 2009 | 2001 Triumph TT 600

1 Answer

Does changing the fuel map smooth the power delivery

A power commander won't help as I believe it is an issue with timing and not fuel delivery. I bought my 2000 and it came with a Power Commander. I tried messing with the fuel with little change in the results. I recently bought a 2002 ecu on ebay and swapped it in. It runs a lot smoother down low although the 5k-6k area feels a little flat so maybe I'll increase fuel there. I really should get it dynotuned at some point. If you're willing to swing the money, buy a Tuneboy instead of a power commander.

Nov 10, 2008 | 2002 Triumph TT 600

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