960 idles fine, misfires with throttle

karlos_uk · Aug 16th, 2010, 09:38

any help here? ive sat it on the drive idling away and it gives an occasional put putput. reving it and it struggled like it totally wanted to die. back fires up through the intake etc
so i disconnected the maf. then it ran beautifuly on idle. no misfires. reving it seemed to make it want to die just as bad.

would i be right in assuming that it is a MAF problem?

karlos_uk · Aug 16th, 2010, 14:36

anyone?

Eddy Matthews · Aug 16th, 2010, 15:44

I'd love to be able to help Karlos, I know how frustrating it can be waiting for help.... Hopefuly someone will be along with some advice soon, remember most people will be at work right now...

The last vehicle I worked on was in about 1982 - Well before ECU's and electronic sensors became commonplace

Regards
Eddy

tc · Aug 16th, 2010, 19:04

Does sound like it could be the MAF, disconnecting it makes the ecu run on defauly setting's hence why it would run better. Best to get the fault codes read before you go splashing the cash though.

grass hopper · Aug 16th, 2010, 19:28

coolant sensor can cause problems also.

karlos_uk · Aug 17th, 2010, 12:37

i am hoping its not just because its out of fuel

bumble · Aug 17th, 2010, 23:40

Id put money on the MAF!
Before you go out and buy a new one take it off and give it a clean gently with alcohol.... Depending on the year (Im not sure) it will have a gauze or twin wires produding into the tube.... Clean it gently.

Then put it back on the car with some WD40 on the elecrical plug.

To the side of the plug will be a plastic recess with an allen key screw. Try slight little adjustments to see if that helps....the screw attenuates the output.

If all that fails - get your wallet out and try 'Glowplugman' on ebay!

grass hopper · Aug 17th, 2010, 23:47

the MAFS with the Allen key were k jetronic fitted to early 360 models or early b200e models etc with continuous injection to set the co.

960 are closed looped lambda,ie the oxy sensor monitors the emissions.

worth checking the fault codes,but could be the MAF sensor,but the sensing wire is heated to clean its self.

but also had numerous cars with the coolant sensor reading marginally wrong to cause poor running,usually over fuelling and high revs on idle,but not logging a fault code.

Aug 16th, 2010, 09:38	#1
karlos_uk Master Member Last Online: Jul 13th, 2019 10:01 Join Date: Mar 2009 Location: Derby	960 idles fine, misfires with throttle any help here? ive sat it on the drive idling away and it gives an occasional put putput. reving it and it struggled like it totally wanted to die. back fires up through the intake etc so i disconnected the maf. then it ran beautifuly on idle. no misfires. reving it seemed to make it want to die just as bad. would i be right in assuming that it is a MAF problem?

Aug 16th, 2010, 19:28	#5
grass hopper Premier Member Last Online: Mar 18th, 2011 13:38 Join Date: May 2009 Location: grassmere!	coolant sensor can cause problems also. __________________

Aug 17th, 2010, 23:47	#8
grass hopper Premier Member Last Online: Mar 18th, 2011 13:38 Join Date: May 2009 Location: grassmere!	the MAFS with the Allen key were k jetronic fitted to early 360 models or early b200e models etc with continuous injection to set the co. 960 are closed looped lambda,ie the oxy sensor monitors the emissions. worth checking the fault codes,but could be the MAF sensor,but the sensing wire is heated to clean its self. but also had numerous cars with the coolant sensor reading marginally wrong to cause poor running,usually over fuelling and high revs on idle,but not logging a fault code. __________________

Aug 16th, 2010, 14:36	#2
karlos_uk Master Member Last Online: Jul 13th, 2019 10:01 Join Date: Mar 2009 Location: Derby	anyone?

Aug 16th, 2010, 15:44	#3
Eddy Matthews VOC Member Last Online: Sep 23rd, 2021 07:27 Join Date: Sep 2006 Location: Pickering, North Yorkshire	I'd love to be able to help Karlos, I know how frustrating it can be waiting for help.... Hopefuly someone will be along with some advice soon, remember most people will be at work right now... The last vehicle I worked on was in about 1982 - Well before ECU's and electronic sensors became commonplace Regards Eddy

Aug 16th, 2010, 19:04	#4
tc VOC Member Last Online: Jan 5th, 2024 15:51 Join Date: Dec 2004 Location: Chorley View Photos By: tc	Does sound like it could be the MAF, disconnecting it makes the ecu run on defauly setting's hence why it would run better. Best to get the fault codes read before you go splashing the cash though.

Aug 17th, 2010, 12:37	#6
karlos_uk Master Member Last Online: Jul 13th, 2019 10:01 Join Date: Mar 2009 Location: Derby	i am hoping its not just because its out of fuel

Aug 17th, 2010, 23:40	#7
bumble Junior Member Last Online: May 30th, 2023 15:23 Join Date: Sep 2006 Location: Sheffield View Photos By: bumble	Id put money on the MAF! Before you go out and buy a new one take it off and give it a clean gently with alcohol.... Depending on the year (Im not sure) it will have a gauze or twin wires produding into the tube.... Clean it gently. Then put it back on the car with some WD40 on the elecrical plug. To the side of the plug will be a plastic recess with an allen key screw. Try slight little adjustments to see if that helps....the screw attenuates the output. If all that fails - get your wallet out and try 'Glowplugman' on ebay!

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