Guys, there was a link explaining this wasnt there?
i checked mine today and ive got no click at all when opening the throttle up a bit :S .. never even bothered to check it before now..
Whats the situation with this in the terms of perfomance or economy.. i though i was running ok,better than ok TBH..
Can someone explain how i check this or is it a bit long winded?
Cheers
Checking TBS
Moderator: martauto
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Brianmoooore
- E30 Zone Team Member
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- Joined: Mon Jan 10, 2005 11:00 pm
Or even the TPS..... (Throttle position switch, or sometimes sensor).
TPS basically switches between different settings in the ECU.
At idle it switches in the idle control valve (ICV), and a fuelling map which provides a stable idle.
Out of idle it gives a reasonably lean mixture for good economy and responds to signals from the air flow meter.
At WOT (wide open throttle) the fueling and timing is adjusted to give max power.
To check the TPS you need to remove the large air hose, unplug the connector to the TPS, and get aresistance meter on the terminals.
1 and 2 should be short circuit (0 ohms) with the throttle closed, going open circuit with the throttle just off the stop.
Pins 1 and 3 should be open circuit, untill the throttle is about 2/3 open, when they should go short circuit.
Because of the way they are mounted, TPSs tend to fill will oil and muck. They can respond well to a good flush out.
TPS basically switches between different settings in the ECU.
At idle it switches in the idle control valve (ICV), and a fuelling map which provides a stable idle.
Out of idle it gives a reasonably lean mixture for good economy and responds to signals from the air flow meter.
At WOT (wide open throttle) the fueling and timing is adjusted to give max power.
To check the TPS you need to remove the large air hose, unplug the connector to the TPS, and get aresistance meter on the terminals.
1 and 2 should be short circuit (0 ohms) with the throttle closed, going open circuit with the throttle just off the stop.
Pins 1 and 3 should be open circuit, untill the throttle is about 2/3 open, when they should go short circuit.
Because of the way they are mounted, TPSs tend to fill will oil and muck. They can respond well to a good flush out.
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JAMZ
- E30 Zone Camper
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- Joined: Wed May 25, 2005 11:00 pm
- Location: Portsmouth
Cheers bud,
Was there an article though on this with some pictures?
i did see it somewhere im sure
Was there an article though on this with some pictures?
i did see it somewhere im sure
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Brianmoooore
- E30 Zone Team Member
- Posts: 49360
- Joined: Mon Jan 10, 2005 11:00 pm
Can't recall it, but if there was, a forum search should find it.JAMZ wrote:Cheers bud,
Was there an article though on this with some pictures?
i did see it somewhere im sure
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JAMZ
- E30 Zone Camper
- Posts: 1214
- Joined: Wed May 25, 2005 11:00 pm
- Location: Portsmouth
Done that and came back with stupid a amount of Threads...
Just need it a blit easier to understand,thats all as ive never done it before... is that with engine running?,ignition on? etc etc
Multimeter on Continious?
I Dont know alot about Engine Electrics TBH hence i was hopeing that thread was around ive seen before,just cant remember where it was :S
Just need it a blit easier to understand,thats all as ive never done it before... is that with engine running?,ignition on? etc etc
Multimeter on Continious?
I Dont know alot about Engine Electrics TBH hence i was hopeing that thread was around ive seen before,just cant remember where it was :S
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Brianmoooore
- E30 Zone Team Member
- Posts: 49360
- Joined: Mon Jan 10, 2005 11:00 pm
Engine off, partly dismantled (air hose off), TPS plug out.
Meter needs to be on lowest resistance range, with continuity b;eeper on if the meter has one.
Meter needs to be on lowest resistance range, with continuity b;eeper on if the meter has one.