If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
This problem started a while ago, but would usually start after
letting it sit for at least 8 hours. Now its been a week and I'm clueless where to start. Recently replaced EG valve and regulator, new plugs and wires. has 133k miles. I have a code reader and nothing came up. Thanks for any help Jim |
Ads |
#2
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On Apr 4, 6:44 pm, J Adams > wrote:
> This problem started a while ago, but would usually start after > letting it sit for at least 8 hours. Now its been a week and I'm > clueless where to start. > > Recently replaced EG valve and regulator, new plugs and wires. > > has 133k miles. I have a code reader and nothing came up. > > Thanks for any help > > Jim Sounds very much like the fuel pump relay. Open the relay box on the passenger side, under the hood. Swap the A/C relay with the fuel pump relay- each has an unused pair of contacts, and they are opposites so they will be good as new. If that doesn't do it, another common problem is the crank position sensor. -Paul |
#3
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On 4 Apr 2007 20:51:43 -0700, "Paul G." > wrote:
>On Apr 4, 6:44 pm, J Adams > wrote: >> This problem started a while ago, but would usually start after >> letting it sit for at least 8 hours. Now its been a week and I'm >> clueless where to start. >> >> Recently replaced EG valve and regulator, new plugs and wires. >> >> has 133k miles. I have a code reader and nothing came up. >> >> Thanks for any help >> >> Jim > Thanks Paul >Sounds very much like the fuel pump relay. Open the relay box on the >passenger side, under the hood. Swap the A/C relay with the fuel pump >relay- each has an unused pair of contacts, and they are opposites so >they will be good as new. > >If that doesn't do it, another common problem is the crank position >sensor. Where is the crank position sensor? Is there a way to test if its bad? >-Paul |
#4
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On Thu, 05 Apr 2007 14:48:20 GMT, J Adams > wrote:
>On 4 Apr 2007 20:51:43 -0700, "Paul G." > wrote: > >>On Apr 4, 6:44 pm, J Adams > wrote: >>> This problem started a while ago, but would usually start after >>> letting it sit for at least 8 hours. Now its been a week and I'm >>> clueless where to start. >>> >>> Recently replaced EG valve and regulator, new plugs and wires. >>> >>> has 133k miles. I have a code reader and nothing came up. >>> >>> Thanks for any help >>> >>> Jim >> > >Thanks Paul > >>Sounds very much like the fuel pump relay. Open the relay box on the >>passenger side, under the hood. Swap the A/C relay with the fuel pump >>relay- each has an unused pair of contacts, and they are opposites so >>they will be good as new. >> >>If that doesn't do it, another common problem is the crank position >>sensor. > >Where is the crank position sensor? Is there a way to test if its bad? > >>-Paul Does it start if you push down the gas pedal? If so, you have a bad idle air control valve. |
#5
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On Apr 5, 6:48 am, J Adams > wrote:
> >Sounds very much like the fuel pump relay. Open the relay box on the > >passenger side, under the hood. Swap the A/C relay with the fuel pump > >relay- each has an unused pair of contacts, and they are opposites so > >they will be good as new. > > >If that doesn't do it, another common problem is the crank position > >sensor. > > Where is the crank position sensor? Is there a way to test if its bad? I don't have personal experience with the crank position sensor, but if you search this newsgroup you'll find info like this: Here's some good info from Dr. Bob on the crank position sensor: "The crank position sensor is the hall effect sensor pointing to the front of the crankshaft. The hub behind the front pulley has grooves machined in it, with one groove missing. the sensor reads each of the pulses from the grooves to know exactly how far the crankshaft has turned, and reads the missing groove to re-identify a known position to reference from. This allows the ignition and fuel injection systems to make sparks and fuel at the right time. There is a 'limp home' mode, as you have discovered, that allows the engine minimum operating ability so you aren't stranded. A failed sensor generates an error code, so the diagnosis is fairly straightforward. If you weren't at a Ford dealer, the $200 is the result of not having the right code reader. The sensor takes mere minutes to change." Here's a description of the problems it causes: "The crank sensor went out last fall on our '92 XL, too. The car would suddenly die and wouldn't start again. After about 10 minutes, it would start up fine and run like there was nothing wrong (until it would die again, usually days later). Finally, it would run only poorly (the "limp home" mode, I guess)." |
#6
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On Thu, 05 Apr 2007 11:38:38 -0400, Big Shoe
> wrote: >On Thu, 05 Apr 2007 14:48:20 GMT, J Adams > wrote: > >>On 4 Apr 2007 20:51:43 -0700, "Paul G." > wrote: >> >>>On Apr 4, 6:44 pm, J Adams > wrote: >>>> This problem started a while ago, but would usually start after >>>> letting it sit for at least 8 hours. Now its been a week and I'm >>>> clueless where to start. >>>> >>>> Recently replaced EG valve and regulator, new plugs and wires. >>>> >>>> has 133k miles. I have a code reader and nothing came up. >>>> >>>> Thanks for any help >>>> >>>> Jim >>> >> >>Thanks Paul >> >>>Sounds very much like the fuel pump relay. Open the relay box on the >>>passenger side, under the hood. Swap the A/C relay with the fuel pump >>>relay- each has an unused pair of contacts, and they are opposites so >>>they will be good as new. >>> >>>If that doesn't do it, another common problem is the crank position >>>sensor. >> >>Where is the crank position sensor? Is there a way to test if its bad? >> >>>-Paul > >Does it start if you push down the gas pedal? If so, you have a bad >idle air control valve. I held the gas pedal down and tried to start with no luck. However, a couple of weeks ago I remember I did that and it started, but not this time. |
#7
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On 5 Apr 2007 08:41:01 -0700, "Paul G." > wrote:
>On Apr 5, 6:48 am, J Adams > wrote: > >> >Sounds very much like the fuel pump relay. Open the relay box on the >> >passenger side, under the hood. Swap the A/C relay with the fuel pump >> >relay- each has an unused pair of contacts, and they are opposites so >> >they will be good as new. >> >> >If that doesn't do it, another common problem is the crank position >> >sensor. >> >> Where is the crank position sensor? Is there a way to test if its bad? > Thanks Paul, Located the sensor, bottom center front (under). I ran the code reader and nothing came up. I think I interpreted what you wrote correctly. >I don't have personal experience with the crank position sensor, but >if you search this newsgroup you'll find info like this: > >Here's some good info from Dr. Bob on the crank position >sensor: > >"The crank position sensor is the hall effect sensor pointing to the >front of the crankshaft. The hub behind the front pulley has grooves >machined in it, with one groove missing. the sensor reads each of the >pulses from the grooves to know exactly how far the crankshaft has >turned, and reads the missing groove to re-identify a known position >to reference from. > >This allows the ignition and fuel injection systems to make sparks and >fuel at the right time. > >There is a 'limp home' mode, as you have discovered, that allows the >engine minimum operating ability so you aren't stranded. > >A failed sensor generates an error code, so the diagnosis is fairly >straightforward. If you weren't at a Ford dealer, the $200 is the >result of not having the right code reader. The sensor takes mere >minutes to change." > >Here's a description of the problems it causes: > >"The crank sensor went out last fall on our '92 XL, too. The car would >suddenly die and wouldn't start again. After about 10 minutes, it >would >start up fine and run like there was nothing wrong (until it would die >again, usually days later). Finally, it would run only poorly (the >"limp home" mode, I guess)." > |
#8
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On 4 Apr 2007 20:51:43 -0700, "Paul G." > wrote:
>On Apr 4, 6:44 pm, J Adams > wrote: >> This problem started a while ago, but would usually start after >> letting it sit for at least 8 hours. Now its been a week and I'm >> clueless where to start. >> >> Recently replaced EG valve and regulator, new plugs and wires. >> >> has 133k miles. I have a code reader and nothing came up. >> >> Thanks for any help >> >> Jim > >Sounds very much like the fuel pump relay. Open the relay box on the >passenger side, under the hood. Swap the A/C relay with the fuel pump >relay- each has an unused pair of contacts, and they are opposites so >they will be good as new. Swapped the relays and still no start >If that doesn't do it, another common problem is the crank position >sensor. >-Paul |
#9
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On Apr 5, 8:10 am, J Adams > wrote:
> > Swapped the relays and still no start > OK, down to basics. To start you need: 1. spark 2. proper fuel/air mixture 3. timing 4. compression At least one of those is missing. 1. Have someone crank it while you check for a spark. Create an 1/8" gap to ground somehow- old spark plug, nail, screwdriver, whatever. However, you should have an error code if the ignition system is not working. 2. Listen near the gas tank while someone turns the key to run. You should hear the fuel pump run briefly. Next check the fuel rail for pressure. It runs along the top of both heads, connecting to each fuel injector. Look for a schraeder valve, like on a tire. Have someone turn the key to run for a few seconds, then off, and see if there is pressure in the rail. Needless to say, there is some danger involved here. Don't be spraying gas all over, smoking, etc. The spec is 35-45 psi, key on, engine off. It is supposed to drop 10 psi when the engine starts. If you don't hear the fuel pump run and there is no fuel pressure, you have narrowed it down to the fuel pump or the fuse and wiring to the pump. There is also a fuel pressure regulator which can fail, in which case the fuel pressure will be wrong. 3. You should have an error code if you have a crank sensor or other timing related problem. 4. I'm sure you'd know if you had no compression in all 6 cylinders. -Paul |
#10
|
|||
|
|||
94 Explorer cranks but no start, details inside Thanks for any help
On 5 Apr 2007 10:14:09 -0700, "Paul G." > wrote:
>On Apr 5, 8:10 am, J Adams > wrote: >> >> Swapped the relays and still no start >> > >OK, down to basics. To start you need: >1. spark >2. proper fuel/air mixture >3. timing >4. compression > >At least one of those is missing. > >1. Have someone crank it while you check for a spark. Create an 1/8" >gap to ground somehow- old spark plug, nail, screwdriver, whatever. >However, you should have an error code if the ignition system is not >working. I checked for spark. Pulled plug, attached plug wire, laid on alternator, cranked. No spark. Used different plug wire, no spark. Also, for some reason the code reader doesn't seem to be working. I had disconnected the battery and reconnected. The alarm kept going off. >2. Listen near the gas tank while someone turns the key to run. You >should hear the fuel pump run briefly. Next check the fuel rail for >pressure. It runs along the top of both heads, connecting to each fuel >injector. Look for a schraeder valve, like on a tire. Have someone >turn the key to run for a few seconds, then off, and see if there is >pressure in the rail. Needless to say, there is some danger involved >here. Don't be spraying gas all over, smoking, etc. The spec is 35-45 >psi, key on, engine off. It is supposed to drop 10 psi when the engine >starts. If you don't hear the fuel pump run and there is no fuel >pressure, you have narrowed it down to the fuel pump or the fuse and >wiring to the pump. There is also a fuel pressure regulator which can >fail, in which case the fuel pressure will be wrong. Should I be able to smell gas once I removed a plug? >3. You should have an error code if you have a crank sensor or other >timing related problem. > >4. I'm sure you'd know if you had no compression in all 6 cylinders. >-Paul > > > > |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
HELP! 97 Explorer cranks but will not start | Jeff[_7_] | Ford Explorer | 6 | July 27th 06 08:37 PM |
Jeep cranks and wants to start but won’t | jeepgirl | 4x4 | 1 | July 22nd 05 04:38 AM |
Acclaim cranks but won't start | Daniel J. Stern | Chrysler | 3 | May 17th 05 04:46 PM |
99 Explorer .. Cranks but does not start ... Pls Help | 99ExLvr | Ford Explorer | 2 | March 23rd 05 05:18 AM |
94 accord cranks but won't start | Matt | Honda | 7 | January 3rd 05 02:06 AM |