Need Help with Pick up problems

**tomtom** · December 24th, 2010 02:34 PM

Hi sirs,

I have a TFR and would really appreciate if you can help me with the ff:

1. whenever I turn on the A/C the voltage meter of my battery goes down to middle but when the A/C is off it goes up to 3/4. what seems to be the problem?

2. while the A/c is turned on, the idling goes down until the whole vehicle shakes, specially when I am not in motion. What i do to prevent this is I step on the gas pedal.

3. while A/c is turned on, there is an obvious decrease in power while stepping on the gas. but it doesn't happen when the A/c is not engaged. is there a problem with the compressor? or is it just normal with the Isuzu 91 model?

Thanks for all your replies. Merry Christmas

**locoroco777** · December 24th, 2010 02:48 PM

whats a TFR sir?

**renzo_d10** · December 24th, 2010 03:20 PM

Kind of pick-up yan bro.

Isuzu TFR.

**batangtalyer** · December 24th, 2010 07:17 PM

idle compensator na naka mount sa gilid ng injection pump. malamang sira na ung diaphragm kase vaccuum operated lang yan.

**tomtom** · December 25th, 2010 01:51 PM

Originally Posted by batangtalyer

idle compensator na naka mount sa gilid ng injection pump. malamang sira na ung diaphragm kase vaccuum operated lang yan.

sir, so yung diaphragm ang problem dun sa 3 na problem ko related sa A/C and sa idling?

**miked** · December 25th, 2010 03:14 PM

Originally Posted by tomtom

Hi sirs,

I have a TFR and would really appreciate if you can help me with the ff:

1. whenever I turn on the A/C the voltage meter of my battery goes down to middle but when the A/C is off it goes up to 3/4. what seems to be the problem? normal lang yan sir tom...A/C is the biggest electrical consumer on a vehicle (plus the electric cooling fan)...pero sa tinagal ng pickup sa inyo ngayon lang ba nangyari ito?

2. while the A/c is turned on, the idling goes down until the whole vehicle shakes, specially when I am not in motion. What i do to prevent this is I step on the gas pedal....adjust the fast idle control. the diaphragm is connected sa vacuum pump connected at the back of the alternator.

3. while A/c is turned on, there is an obvious decrease in power while stepping on the gas. but it doesn't happen when the A/c is not engaged. is there a problem with the compressor? or is it just normal with the Isuzu 91 model?...related to #1...the magnetic clutch activates to compress the vapor inside the compressor...usually 1-3 hp ang mga A/C compressors. it is normal na maglower down ang power.

Thanks for all your replies. Merry Christmas

maligayang pasko rin sir

**tomtom** · December 27th, 2010 05:23 AM

Originally Posted by miked

maligayang pasko rin sir

ngayon lang sir nangyari sa akin yung problem #1. may nagsasabi kaya daw bumababa yung idling kasi sira daw yung "idler's up". any comments on this po? thanks

**Benzmizer** · December 27th, 2010 08:01 AM

Originally Posted by tomtom

ngayon lang sir nangyari sa akin yung problem #1. may nagsasabi kaya daw bumababa yung idling kasi sira daw yung "idler's up". any comments on this po? thanks

You mean IDLE UP. Could be. First I read your post made me want to suggest you to check that but I thought there may be other issues that may have contributed to it. Either way, it would not harm to have that one checked too.

**digitel** · December 27th, 2010 09:10 PM

is it just normal with the Isuzu 91 model?

For this question

Originally Posted by locoroco777

whats a TFR sir?

Answer:
http://tinyurl.com/337ne5w

Regarding problem number 1, Okay pa po ba yung alternator nung tfr niyo sir?

**4JGtootsie** · December 27th, 2010 10:23 PM

Originally Posted by tomtom

Hi sirs,

I have a TFR and would really appreciate if you can help me with the ff:

1. whenever I turn on the A/C the voltage meter of my battery goes down to middle but when the A/C is off it goes up to 3/4. what seems to be the problem?

2. while the A/c is turned on, the idling goes down until the whole vehicle shakes, specially when I am not in motion. What i do to prevent this is I step on the gas pedal.

3. while A/c is turned on, there is an obvious decrease in power while stepping on the gas. but it doesn't happen when the A/c is not engaged. is there a problem with the compressor? or is it just normal with the Isuzu 91 model?

Thanks for all your replies. Merry Christmas

Umiilaw ba yung charge light when ever you turn on the AC?
Umiikot ba yung aux fan (normal speed/grounded sound)?
Check if the line of the AC wires and solenoid valve of the Injection pump are touching or share the same ground.
If the idling goes down certainly the charging will be affected. You just have to know if the AC is the cause or the victim.