Hi all,
speaking of injection problems, here's one for you.
I drive a 92 Spi 1293, quite modified, but from the moment I got it Iexperienced breakdowns. At first it was thought to be the ignition coil (according to recovery chap) however next on the symptom list was the fuel pump, taking this out of the tank and checking that it worked with a live feed from the battery meant the fuel pump relay was at fault.
Must have been on the way out for a while...
Now it has a direct feed from the battery with a switch to operate the pump, (does mean fumbling around in the boot for the switch tho')
However... new problem...
It seems that the mini is in 'Limp Home Mode' as the engine will not rev over about 2500. Could this be because I've by-passed the fuel pump relay? there are no lights on the dash to say there is a problem and do not have access to a diagnostic machine.
I'm going to try a second hand relay module from ebay when it arrives... I'll keep you posted. Untill then, if anyone has any other ideas, let me know.
Thank in advance,
Lee (and Git the mini)
Injection problems
Started by
Git
, Mar 22 2008 05:40 PM
18 replies to this topic
#1
Git
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Posted 22 March 2008 - 05:40 PM
#2
DaveRob
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Posted 23 March 2008 - 07:43 AM
Not totally sure about the 92 version but their is a switch on the throttle pedal that tells the ECU when you actuate the pedal. On the 92 versions, I THINK, this tells the ecu to come out of idle mode and move into go mode. Later cars didnt do this...... The reasons for dropping into Limp Home would be faulty sensors. If you check some of Sprockets posts pinned you will find how to check most of them.....and 'dry out' your MAP sensor..... but first off Id check the throttle pedal switch to make sure its still working.
Just my thoughts and like I said.... I THINK.....
DaveRob
Just my thoughts and like I said.... I THINK.....
DaveRob
#3
BoyracerAU
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Mini Mad
Posted 24 March 2008 - 02:12 AM
Does it not rev above 2,500rpm at all? Or only when it's fully warmed up?
What happens when you try to rev above 2,500rpm?
I can't see how bypassing the fuel pump relay would throw it into limp home mode. As DaveRob says, this only happens when a sensor goes.
Be interested to hear more about what you're experiencing.
What happens when you try to rev above 2,500rpm?
I can't see how bypassing the fuel pump relay would throw it into limp home mode. As DaveRob says, this only happens when a sensor goes.
Be interested to hear more about what you're experiencing.
#4
Git
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Posted 24 March 2008 - 06:22 AM
Does it not rev above 2,500rpm at all? Or only when it's fully warmed up?
What happens when you try to rev above 2,500rpm?
I can't see how bypassing the fuel pump relay would throw it into limp home mode. As DaveRob says, this only happens when a sensor goes.
Be interested to hear more about what you're experiencing.
Hi Mate,
No, it does not rev over 2500 at all. If you keep your foot down and not lift, the revs just drop down to about 2200, by this time you've lifted a bit to even it out. I'll try the throttle switch as DaveRob suggests (£15 new) once I've rescued 'Git' from outside the inlaws place.
I'd love to use #Git' to travel to work again, but there's no way I'm going to travel down the M1 at 50mph... that's just wrong!!
#5
BoyracerAU
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Posted 24 March 2008 - 06:29 AM
So, no backfires? Just won't go.
#6
Git
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Posted 24 March 2008 - 06:39 AM
So, no backfires? Just won't go.
Nope, if I drive it like a grandma, the Git performs admirably, it's just that I like to change gear at about 3-3500 revs at least.... you know!
#7
DaveRob
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Posted 24 March 2008 - 08:13 AM
Keep us updated mate...... someone else WILL have this problem and you might have the answer...lol
DaveRob
DaveRob
#8
Git
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Posted 24 March 2008 - 08:46 AM
Keep us updated mate...... someone else WILL have this problem and you might have the answer...lol
DaveRob
Of course, need to smile on the way to work (hour each way sooooooo boring in a fiesta!!!!)
Cheers DaveRob.
#9
Git
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Posted 30 March 2008 - 03:08 PM
Right, just tried something before I order a new throttle switch,
I read in another thread about resetting the ECU, you know the one, turn the key to 2 (lights on dash, pump the throttle 10 times within 10 seconds etc)....... well, it sort of worked ...for a bit. I took the car for a spin, Down to Santa- Pod gates and back. It went great (revving to well over 4000!!!) up to the crossroads for the Pod, then it died back down to 2500 limit. do you still think its the throttle switch? or does it sound more sensor related?
I read in another thread about resetting the ECU, you know the one, turn the key to 2 (lights on dash, pump the throttle 10 times within 10 seconds etc)....... well, it sort of worked ...for a bit. I took the car for a spin, Down to Santa- Pod gates and back. It went great (revving to well over 4000!!!) up to the crossroads for the Pod, then it died back down to 2500 limit. do you still think its the throttle switch? or does it sound more sensor related?
#10
ICAM
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Posted 30 March 2008 - 04:25 PM
Do check the throttle switch connector and wiring harness before replacing it. It could be be a loose/rust connector or some wire shorted to the body.
#11
DaveRob
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Posted 31 March 2008 - 07:38 AM
Right, just tried something before I order a new throttle switch,
I read in another thread about resetting the ECU, you know the one, turn the key to 2 (lights on dash, pump the throttle 10 times within 10 seconds etc)....... well, it sort of worked ...for a bit.
Im with Sprocket on this one......... I cant see why the pump the throttle thing is real....personally I belive this to be an urban myth...lol...... The ECU can be reset with a fault code reader.... its a specific detail in the list of thing s you can do with an FCR. More likley ...in my opinion.... is that you stamping on the accelerator dislodged the switch and made it work again......until it decided to revert back to non function mode..... just my opinion...but I think its far more likley , now you have said about the throttle thing, that the switch is the big culprit in this thing
DaveRob
#12
Git
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Posted 31 March 2008 - 05:13 PM
Do check the throttle switch connector and wiring harness before replacing it. It could be be a loose/rust connector or some wire shorted to the body.
Thanks, one question tho'
Is the throttle switch and connections on the side of the throttle body, or somewhere near the actual pedal? (pics would be handy)
So soz for being a thicko!
#13
BoyracerAU
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Posted 31 March 2008 - 10:22 PM
On a '92, your throttle switch would be a at the top of the pedal.
#14
Git
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Posted 01 April 2008 - 08:29 AM
On a '92, your throttle switch would be a at the top of the pedal.
Thanks,
Just had a look down by the throttle pedal and this is what I found... I think I might be blind... am I missing it all together?
I've added a couple of pics of the throttle body aswell.
Thanks for your help.
Lee
#15
Git
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Posted 01 April 2008 - 11:58 AM
Yay me!!!!! (and you guys, of course!!!)
Git is fixed... well, sort of...
Found the throttle switch, as described, it was by the throttle pedal. I poked my fingers around the area where the little green wires disappear behind the top of the pedal and pumped the gas... yay, it revved over 3000. great, (dodgy connection?) I thought, just put the carpet and hoses back and off I go... ah! not so fast, once all the bits were back, so was the fault, now with added backfire.
I know, I thought, lets see where these wires go... found a connector... what happens if I just unplug it. Bingo, car runs great... took it to Santa-Pod and back..... Yipee!!!
Now, I know that it's not exactly fixed (in the normal meaning) but I can drive Git ok now..... However, on a more serious note... What problems could occur now that the throttle switch has been disconnected? what's the point in them anyway?
Thanks for all your help guys.. I really mean it.
Git is fixed... well, sort of...
Found the throttle switch, as described, it was by the throttle pedal. I poked my fingers around the area where the little green wires disappear behind the top of the pedal and pumped the gas... yay, it revved over 3000. great, (dodgy connection?) I thought, just put the carpet and hoses back and off I go... ah! not so fast, once all the bits were back, so was the fault, now with added backfire.
I know, I thought, lets see where these wires go... found a connector... what happens if I just unplug it. Bingo, car runs great... took it to Santa-Pod and back..... Yipee!!!
Now, I know that it's not exactly fixed (in the normal meaning) but I can drive Git ok now..... However, on a more serious note... What problems could occur now that the throttle switch has been disconnected? what's the point in them anyway?
Thanks for all your help guys.. I really mean it.
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