If you dont need a permanent gauge, a diagnostic gauge takes about 30 seconds to hook up and costs under 40 bucks in most cases.
It's a must-have tool if you work on EFI cars. Sometimes you need to check the accuracy of a permanent gauge itself.
Hission50 jump in on this,,,im in a paper book ,and when i said code 41/91 went to H1,,if that is proper than ,im not sure if step H1 was done right..H1-install fuel pressure gauge,verify that manifold vacuum is connect to the fuel pressure regulator if applicable,start and run engine at idle,refer to fuel pressure specifications table,is fuel pressure within specs for the engine being tested?.....5.0 ma sefi...27-37...(key off 35-45)..if this is proper than H2-H3 are ability to hold pressure and fuel delivery?
This is what I was trying to ascertain. He needs to test the pressure under a load, which is where a weak pump or restriction can show its head.
Your 27-37 spec is with the vac line connected at idle (KOER). I would surmise the KOEO 35-45 would be for the vac line disconnected. The EEC is programmed to see ~42 PSI at WOT (no manifold vac to the FPR).
My rule of thumb, and what is in some Factory manuals IIRC, is pressure should not be below 30 PSI at any time, and should be 39-45 at simulated WOT.
Do you have an open breather installed as an oil cap on the RH valve cover? ... is the breather hose from the oil filler neck connected to the TB?...... if so, you need to restore it to the OEM configuration (oil cap and breather hose).
You could also use the system to verify O2 signals, cause an obviously rich condition whil a KOER is run..... disconnect and plug PCV valve and FPR vacuum, or you may also want to add some fuel through the FPR vacuum line from a container (not allowing the engine to stall)..... and check if codes 42/92 show up instead. This will help in isolating the codes possible cause as non-EEC related. LUK
This is step H18,, i have asked already if fords manual is the true step by step to troubleshooting,,,it is,,,code 41/91 or 42/92 both start at H1...FWIW,,anytime a part is changed and problem is still thier ,you must follow all steps starting at step 1.....in this manual fuel control has 30 steps ,not that all 30 are for 41/91. some like hission50/jricher might have short cuts learned over the years,but this is why troubleshooting is so hard,, one bad ground can cause all this ,or something not looked at so thats why pin test done in order works.Do you have an open breather installed as an oil cap on the RH valve cover? ... is the breather hose from the oil filler neck connected to the TB?...... if so, you need to restore it to the OEM configuration (oil cap and breather hose).
You could also use the system to verify O2 signals, cause an obviously rich condition whil a KOER is run..... disconnect and plug PCV valve and FPR vacuum, or you may also want to add some fuel through the FPR vacuum line from a container (not allowing the engine to stall)..... and check if codes 42/92 show up instead. This will help in isolating the codes possible cause as non-EEC related. LUK
was reading the steps over again and as to hission50`s train of thought on where hes going ...I forgot to follow my own words,,,were thier any other codes present... at the first time you check it, to now if you were to scan it,all of them even if they dont show now.
excuse my newbiness but when i disconnect the stuff you said and plug it up. i pull the line out of the FPR and plug that line?? and do i pull the whole PCV and plug the hole or just pull the hose out of the pcv and just plug up the the PCV
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?