Hey guys, I am officially coming out of my lurking closet to actually post a question that i havn't been able to search for and find an answer to as I have so many other times in the past. Hopefully this is an easy one....
I have a 92 sport, l6 auto 4x4, 115k, mostly stock, that I have been slowly resurrecting. When I first got it, it didn't run and have since replaced the computer, cps, fuel pump, ignition switch, etc. etc. Recently its developed this nasty habit of not starting (mostly) in the morning after its sat all night. When I put the key in and turn to the "on" position normally you hear the fuel pump prime, in the upper left corner of the dash you see the "maint required" and the "check engine" lights come on all in the same sequence. Lately however, When I turn the key on, I get nothing. after about 30 sec. to 3 min, I'll start to hear a very faint clicking sound coming from the relay box on the passenger side of the engine compartment, that will steadily get louder (takes about 15 sec.) until the you hear the fuel pump start to prime and the indicator lights (in the dash) come on synonymously. After it does this it usually starts on a few cranks but I have had to fuss with it more recently (Cranking it over until it finally sputters to life ). Once it starts, or has been driven for a while (25 min work commute) it seems to start up promptly, the fuel pump and all other functions seem to operate normally, and all symptoms are gone, even after it sits for a 10 hour day, it will only delay slightly if at all. As mentioned previously I did replace the fuel pump recently and have heard of symptoms where the internal parts inside the pump fail and allow the fuel to drain back into the tank making starting difficult. What I dont know is how to isolate the problem to the pump or how to at least test the pump itself. As far as the relays are concerned, I havn't replaced any of them, but I did leapfrog em around, took them apart and checked for corrosion, or carbon, sanded contact points and still no change. Checked wiring connections (at the gas tank under the vehicle) , added dielectric grease, no luck. diagnosing is a little difficult once you get it started as the symptoms go away......
If there is anyone out there that has had this problem before or has any suggestions on how to chase this down I would greatly appreciate any info. Mahalo
I have a 92 sport, l6 auto 4x4, 115k, mostly stock, that I have been slowly resurrecting. When I first got it, it didn't run and have since replaced the computer, cps, fuel pump, ignition switch, etc. etc. Recently its developed this nasty habit of not starting (mostly) in the morning after its sat all night. When I put the key in and turn to the "on" position normally you hear the fuel pump prime, in the upper left corner of the dash you see the "maint required" and the "check engine" lights come on all in the same sequence. Lately however, When I turn the key on, I get nothing. after about 30 sec. to 3 min, I'll start to hear a very faint clicking sound coming from the relay box on the passenger side of the engine compartment, that will steadily get louder (takes about 15 sec.) until the you hear the fuel pump start to prime and the indicator lights (in the dash) come on synonymously. After it does this it usually starts on a few cranks but I have had to fuss with it more recently (Cranking it over until it finally sputters to life ). Once it starts, or has been driven for a while (25 min work commute) it seems to start up promptly, the fuel pump and all other functions seem to operate normally, and all symptoms are gone, even after it sits for a 10 hour day, it will only delay slightly if at all. As mentioned previously I did replace the fuel pump recently and have heard of symptoms where the internal parts inside the pump fail and allow the fuel to drain back into the tank making starting difficult. What I dont know is how to isolate the problem to the pump or how to at least test the pump itself. As far as the relays are concerned, I havn't replaced any of them, but I did leapfrog em around, took them apart and checked for corrosion, or carbon, sanded contact points and still no change. Checked wiring connections (at the gas tank under the vehicle) , added dielectric grease, no luck. diagnosing is a little difficult once you get it started as the symptoms go away......
If there is anyone out there that has had this problem before or has any suggestions on how to chase this down I would greatly appreciate any info. Mahalo