SOHC 'jolt' at cruising speed
Member
Joined: Jul 2007
Posts: 949
Likes: 1
From: Baltimore, Maryland
im tellin you just take them out and if they look "burned" youll prolly have to replace them, one thing knocking is caused by is hot spots and i guess the ones i had didnt burn everything evenly and thats why it knocked, and no mine happend when you put a considerable amount of strain on the engine in the higher gears right? 4th and 5th more 5th tho but around 35-45mph at 1500-2000rpms
Member
Joined: Jul 2007
Posts: 949
Likes: 1
From: Baltimore, Maryland
alright yea your problem sounds exactly like mine use to be, but yeah if its not what im tellin you then my bad but ive always had that problem associated with spark, i replaced the fuel filter, iac, iat, tps, maf, throttle body, and all the o2's and still nothing
Member
Joined: Jul 2007
Posts: 949
Likes: 1
From: Baltimore, Maryland
nah just replaced it (lil bit of a stick) your not supposed to clean it really but the iac is the idle air control valve, and the iat idle air temp, iac controls how much air enters the engine when you let off the gas, and the iat is simply a therm. that tells the computer how much fuel to use along with the maf
IAC is intake air temperature, it lets lets the PCM know how dense the air is so it knows how much fuel to deliver
clean the throttle body, i know they say not to because of the teflon coating it has, but if there is carbon on it, the coating isnt doing its job anyway
do not use bosch platinum +4 plugs, the 4.0 is lean for emissions, and it will get hot enough to burn one or more of the electrodes off and have em drop down in the cylinders, seen it happen numerous times at both of the shops ive worked at, happens on 4.0, 4.6 and 5.4s alot.
plugs are failry easy on SOHC motors except for the one in the passenger rear but it isnt that bad. clean everything first as i told you though
clean the throttle body, i know they say not to because of the teflon coating it has, but if there is carbon on it, the coating isnt doing its job anyway
do not use bosch platinum +4 plugs, the 4.0 is lean for emissions, and it will get hot enough to burn one or more of the electrodes off and have em drop down in the cylinders, seen it happen numerous times at both of the shops ive worked at, happens on 4.0, 4.6 and 5.4s alot.
plugs are failry easy on SOHC motors except for the one in the passenger rear but it isnt that bad. clean everything first as i told you though
Here
http://www.aempower.com/ViewCategory.aspx?CategoryID=93
I hope you clear it up before you go to Alberta
I have the auto 5R55E, I've done the trans flush and filter but next im going to do is the EPC since it fixed it for Yamanube. I've been researching this for the past 3 months but now is Justin helping me out trying to fix it.
Mine did it between 40- 55 mph areound 2- 2500 rpms
Heres the TSB
TSB
05-5-8 SURGING SENSATION DURING CRUISE AT STEADY SPEEDS OF 35-50 MPH (56-80 KM/H) - 4.0L ENGINE
Publication Date: March 4, 2005
FORD: 2004-2005 Ranger
ISSUE:
Some 2004-2005 Rangers equipped with a 4.0L engine and an automatic or manual transmission, may exhibit a surge sensation during cruise at steady speeds between 35-50 MPH (56-80 Km/h). The condition will occur after a cold start and may continue for approximately 5 miles (8 Km) or 5 minutes.
ACTION:
Reprogram the powertrain control module (PCM) to the latest calibration level using WDS release B35.9 and higher, or B36.2 and higher. Calibration files may also be obtained at www.motorcraft.com.
NOTE: THIS NEW CALIBRATION IS NOT INCLUDED IN THE B36.0 CD.
WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
OPERATION DESCRIPTION TIME
050508A 2004-2005 Ranger 4.0L: Check For Diagnostic Trouble Codes And Reprogram Powertrain Control Module (Do Not Use With 125650D, 12650D84) 0.4 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
RECALEM 04
--------------------------------------------------------------------------------
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.
Copyright © 2005 Ford Motor Company
Mine did it between 40- 55 mph areound 2- 2500 rpms
Heres the TSB
TSB
05-5-8 SURGING SENSATION DURING CRUISE AT STEADY SPEEDS OF 35-50 MPH (56-80 KM/H) - 4.0L ENGINE
Publication Date: March 4, 2005
FORD: 2004-2005 Ranger
ISSUE:
Some 2004-2005 Rangers equipped with a 4.0L engine and an automatic or manual transmission, may exhibit a surge sensation during cruise at steady speeds between 35-50 MPH (56-80 Km/h). The condition will occur after a cold start and may continue for approximately 5 miles (8 Km) or 5 minutes.
ACTION:
Reprogram the powertrain control module (PCM) to the latest calibration level using WDS release B35.9 and higher, or B36.2 and higher. Calibration files may also be obtained at www.motorcraft.com.
NOTE: THIS NEW CALIBRATION IS NOT INCLUDED IN THE B36.0 CD.
WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
OPERATION DESCRIPTION TIME
050508A 2004-2005 Ranger 4.0L: Check For Diagnostic Trouble Codes And Reprogram Powertrain Control Module (Do Not Use With 125650D, 12650D84) 0.4 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
RECALEM 04
--------------------------------------------------------------------------------
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.
Copyright © 2005 Ford Motor Company
It can't be my plugs. I've had brand new NGK V-Power plugs installed for exactly 1 week now.
I am definetly ruling the problem out to be my air filter. It makes the most sense. I'm going to go out now and take a look at things and clean stuff up and take it for a test run.
If it is a spark or iginition related problem, then it would happening constantly. It would start rough and idle poorly and hesitate all the time on the road, which is not the case.
It's just driving down the road and all of a sudden the truck just jolts for like a second, like a heart skipping a beat.
I am definetly ruling the problem out to be my air filter. It makes the most sense. I'm going to go out now and take a look at things and clean stuff up and take it for a test run.
If it is a spark or iginition related problem, then it would happening constantly. It would start rough and idle poorly and hesitate all the time on the road, which is not the case.
It's just driving down the road and all of a sudden the truck just jolts for like a second, like a heart skipping a beat.
