Jeep - Cherokee :: 1987 - Starts Immediately If Relieve Fuel Pressure At Fuel Rail
Aug 9, 2012
I have a 1987 jeep cherokee with inline 6 and multi port injection.
Sometimes this vehicle only starts when hot
Some times only when it cold
I have recently fixed the fuel leak.
When its hot or cold and not starting if i relieve the fuel pressure at the fuel rail, in most cases it will start immediately. However if fuel pressure relief does not work. I disconnect the vacuum line at the what looks to be the EGR valve or the pressure regulator at the front end of the rail, then usually starts right away.
I have not tested at this time to see if the fuel pump is failing nor have i tested fuel pressure. I am trying to narrow down the problem to one specific part. There is no problems with cranking. There is spark - coil, plug, dist cap have been replaced.
It seems the problem is with fuel delivery of sorts. It was mentioned that sometimes the heat from the engine could be heating the fuel rail to a point which turns the fuel into a gas not allowing it to atomize.
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I am getting no pressure at the fuel rail. Relay seems to be ok, so I am assuming the pump just failed (in the driveway luckily). Before I drop the fuel tank, I would like to confirm I am getting voltage back to the pump. I cannot fine any wiring in or under the car going to that area! How to find that circuit as close to the pump as possible and still accessible without dropping the tank?
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I cant find the port on fuel rail to get a fuel pressure reading.it is nothing like my tarus.saw astem sticking up on front right of rail but it has some kind of covering over it. It is a 2005 freestar with the 3.9 motor.
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I purchased a 1990 Jeep Cherokee Laredo at a steal . . . I've already replaced the head gasket sealant. My biggest current concern is the fuel pressure. The car either starts up beautifully or sputters and gurgles for a good 5 seconds before finally idling normally (either occur during cold or warm starts).
The sputtering at start-up has become more commonplace as of late. If I drive away without providing a good three-to-five minute warm-up, the car will drive as normal while applying gas pressure to the peddle, then once gas pressure is no longer applied, the car dies silently; The battery stays on, but all power steering and engine power disappear and the car coast into nothingness. If I allow the Jeep to warm up significantly, it will drive as normal for hours, except for it's struggles to compensate long upward hills.
The fuel regulator has a slight leak. Worse at start-up, lessens up over time. The seal may be improperly seated, but is in physical working condition as I can tell. Spark plugs were replaced. Battery was replaced. Injectors have been tightened. There is a slight oil leak (it seems to move around a bit), but is far better since the Head Gasket was replaced. Could this be a bad fuel regulator or something else that I have missed?
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I picked up a Haynes manual for the engine/head removal. It has the procedure for 2003 pressure release by unplugging the fuel pump and running until it dies. Unfortunately the car does not run. I do not know what to do now.
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A friend has a 1999 Caravan with the 3.0L engine. He couldn't get it to start and to make a long story short, I checked the fuel pump relay and fuse and they were good but there was no pressure on the fuel rail. Turning the key I couldn't here the fuel pump come on and determined the fuel pump was bad.
I changed the fuel pump and fuel filter put in 1/4 tank of gas and turned the key, and it turned over but wouldn't start. I can audibly hear the fuel pump come on for a second or so, and feel the vibration when I put my hand on it, but there is still no pressure at the fuel rail.
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I stopped and when I started the SF the engine light stayed on. I shut it off and checked oil. Oil good. When I started it again it didn't start as swiftly as it normally would. Since I still had 150km to go in the dark I decided to give it a whirl as the alternative, like waiting for a tow truck, would be many hours.
Max rpm, about 2000. Give more gas and it sputters. Eventually nursed it to maintain 80-100 kmh at the 2k rpm. Since it was mostly downhill I continued to at least get closer to civilization. Found sort of a sweet spot and was able to maintain 100kmh on level ground and lost some on grades. Engine was running smooth.
As it turned out I made it home. Total milage on SF: 58,250 km. Guess I'll see what the dealer says on Monday.
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So I've gotten this error code a few times now but never a CEL nor does the car drive any diff.
1 Fault Found:
000136 - Fuel Rail/System Pressure: Too High
P0088 - 000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 1
[Code] ....
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Next mods are for the fuel rail cross over and the high pressure oil cross over. I see the unused ports will come in handy.
Fuel delivery? any specialty mods to run the fuel lines? I see it's a #4 ORB fitting. Anyone ever use a "T" or a splitter off the fuel bowl to have a quad line set up?
Saw the FRx from RiffRaff .... not sure how it eliminates air from the system 7.3L Diesel Fuel Rail Crossover? (FRx) 99-03 Powerstroke
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1990 Cherokee 4.oL str 6.
I was checking oil and noticed fuel smell in oil. lot of short trips but also driven til hot at least a couple of times every week with long rides weekly or bi weekly.
Also smelling gas on start up and first minute or so. Some fuel smell in exhaust. The jeep runs well.
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I have a 1994 volvo 850 turbo wagon. While replacing the pcv breather system, I dropped a little metal clip that attaches the fuel line to the fuel rail with a t25 torx screw. I can't find the clip. What the part is called or where it can be found?
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I have an issue of fuel pressure I believe on my 2003 3.5 Santa fe...It would start then stall...I'm at my wits end with this thing...I checked the relay and its good...checked all fuses and they are good...I don't hear the 2-3 second whine of the pump when I turn the ignition to the on position, so I suspected a bad pump...but before I bought a new pump I took out the back seat, removed the access cover and checked the connector to see if the pump is getting power...its not...I'm at a loss as to where to look next...
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I have a 1987 ford 350 when i go up a steep hill the truck starts to skip and break down to a point where I have to pull over i just put in new fuel pump in tank, what could be the problem only happens on hills.
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I've got a 1998 Jeep Cherokee Sport 4x4, 4.0 L I6, automatic, 169k miles, that often cranks but doesn't start up. When I cut the power and try again, it starts up right away. I'm concerned this workaround will one day not work and I'll be left stranded, so I'd like to fix this if it's cheap and easy. The symptoms suggest either a lack of fuel or lack of spark due to an electrical problem, so I replaced the ASD (auto shutdown) and Fuel Pump relays, but they made no difference. The other two relays - Starter and Cooling Fan - seemed irrelevant. What this could be? Maybe the crank angle sensor? (I'm not even sure where that's located.)
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Why the frame mounted fuel pump might run after the key is turned off? Then when you turn the key on it may or not run. If it does run it keeps running. shouldn't this shut off after pressurizing the line? is their a pressure switch in the pump that's failing? This has the 3 pump system...
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I have an 87 F150 4x4 4.9L EFI with a single tank. Fuel pumps keep running even when the key is off. I tried swapping relays but the problem still exists. The engine will start and run OK for about 15 secs. then die. I installed a new low pressure pump, high pressure pump seems to be OK. I also installed new fuel filters. I dont want to just throw parts at this truck, where do I go from here?
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I need to check the fuel pressure to verify if my fuel pump is functioning. What is the procedure and PSI?
Assume that I open the valve on fuel rail with engine off, then connect pressure tester kit, put key in ignition to "on" position, then pump up to specified PSI???
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I got a 2002 GTI 1.8t , with about 109,xxx miles. Ran into a few problems, I took the hose off the fuel rail and turnt the key on. & noticed the fuel pressure was noticeable low & another problem i got is the car doesnt start most of the time. it takes about 3 or 4 cranks before it eventually tuns over. sometimes i noticed if i turn the key on and leave it for a minute or so itll start up. finally want to fix this POS. so I decided to run the codes & heres what i got
P0230
Fuel Pump Primary Circuit Malfunction
CONFIRMED
P0341
Camshaft Position Sensor A Circuit Range/Proformance B1
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I live on a boat access only island, so desperate. This jeep has over 230,000 km on it. Runs well, but this year started this thing where it won't start first time crank, but always starts second or third go. Bought new battery last year, so doesn't seem to be that kind of issue.
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Just bought a 1996 Jeep Cherokee Sport 4.0 Auto trans. The other morning my jeep wouldn't start. Power everything works, lights work, back up lights work. Starter had been sluggish so I had it tested. Tested fine. Hook the starter back up and when I attach battery it turns over and runs constantly.
I removed the ignition wire from the starter solenoid and hooked it back up and the same thing happened. So I deduced the starter solenoid was stuck. Bought a new starter and replaced my old. Old starter was tested at autozone and it worked properly there (didn't run without ignition).
I just bought the new starter anyway. Hook up battery and same thing happens--starter turns over. How would just the cable from the battery be able to turn the starter over if it is all good?
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I have a 93 grand cher with 194,000 miles on it. I have never had a problem until now. When driving the jeep sometimes it stalls and then starts back up again and you keep driving. Or othertimes it stalls when you are stopped and you need to start it back up. I had it at 2 dealerships but they can not find anything wrong because it is an intermittent problem and never happens when they have it.
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