Hard to push pedal accelerator - Page 3

ukdido · Nov 4th, 2012, 15:21

I did spray yesterday Maf by contact cleaner,and TB. I have find erorr code PO172 Today, nothing more.I did checking how much throttle is open when ignition on. Was no fully open ,only 80%. Seems to be Tps problem?

ukdido · Nov 7th, 2012, 17:46

Disconected Maf for test ,nothing change. Thats mean's is bad?

acshortt5 · Nov 7th, 2012, 18:21

No.

When a MAF is bad you should normally see an improvement when you disconnect it.

No change means the MAF is probably fine. However the only way to be 100% sure would be to log and check the MAF values over a full throttle run through several gears.

ukdido · Nov 7th, 2012, 18:41

I did read post about cruise control.My not working .Any conections between power and CC? I mean's sticky brake sensor or vacuum issue?

ukdido · Nov 11th, 2012, 17:06

ok,full service done.Which means all filters,spark plug,oil,all brakes also.Split one of PCV has been repaired. Maf was sprayed by contact cleaner (bothsides).Idlle valve sprayed by wd40. Car pull good on first gear,after that I have filing that I pull caravan.Autobox no sleep ,increase with rpm.Strange thing,since service when car start on cold ,missfire litlle for 5 sec.After first start no more mifi.I did not checking Maf data yet,but I think lowering air flow bit.

PS.I have elm 1.4 rev which should work with Vol-Fcr but does not.Anyone had experience with elm and that program?

Nov 4th, 2012, 15:21	#21
ukdido Senior Member Last Online: Jan 3rd, 2020 15:15 Join Date: May 2009 Location: Basingstoke	I did spray yesterday Maf by contact cleaner,and TB. I have find erorr code PO172 Today, nothing more.I did checking how much throttle is open when ignition on. Was no fully open ,only 80%. Seems to be Tps problem? Last edited by ukdido; Nov 4th, 2012 at 17:35. Reason: more information

Nov 7th, 2012, 18:21	#23
acshortt5 Volvo Nutcase Last Online: Jul 14th, 2023 12:57 Join Date: May 2007 Location: N/A View Photos By: acshortt5	No. When a MAF is bad you should normally see an improvement when you disconnect it. No change means the MAF is probably fine. However the only way to be 100% sure would be to log and check the MAF values over a full throttle run through several gears. __________________ Andrew 1998 S70 T5 CD AUTO Previously a 1990 240 GLT-R

Nov 7th, 2012, 18:41	#24
ukdido Senior Member Last Online: Jan 3rd, 2020 15:15 Join Date: May 2009 Location: Basingstoke	I did read post about cruise control.My not working .Any conections between power and CC? I mean's sticky brake sensor or vacuum issue? Last edited by ukdido; Nov 7th, 2012 at 20:09.

Nov 11th, 2012, 17:06	#25
ukdido Senior Member Last Online: Jan 3rd, 2020 15:15 Join Date: May 2009 Location: Basingstoke	ok,full service done.Which means all filters,spark plug,oil,all brakes also.Split one of PCV has been repaired. Maf was sprayed by contact cleaner (bothsides).Idlle valve sprayed by wd40. Car pull good on first gear,after that I have filing that I pull caravan.Autobox no sleep ,increase with rpm.Strange thing,since service when car start on cold ,missfire litlle for 5 sec.After first start no more mifi.I did not checking Maf data yet,but I think lowering air flow bit. PS.I have elm 1.4 rev which should work with Vol-Fcr but does not.Anyone had experience with elm and that program? Last edited by ukdido; Nov 11th, 2012 at 17:13.

Nov 7th, 2012, 17:46	#22
ukdido Senior Member Last Online: Jan 3rd, 2020 15:15 Join Date: May 2009 Location: Basingstoke	Disconected Maf for test ,nothing change. Thats mean's is bad?

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