C/K :: 98 C1500 5.7L Fuel Pressure - Spark But No Start
Jun 29, 2012
After replacing the intake manifold gasket for the second time, the truck would not start. Thought for sure it was my putting the distributor in wrong. After reviewing the forums, I am sure it is installed correctly. I have spark but no start. Engine cranks over nicely, but acts like it needs fuel. I hooked up a fuel gauge, turned on the key and get 56PSI. Lower than the 60 required. The pressure then slowly goes to 50 PSI. I pinched off the return hose and had the same readings. Pretty sure I need to replace the fuel pump. Is there anything else I need to check. I replaced the fuel pump a couple years ago with a Delphi unit. Maybe this is just a weak link for these trucks. My truck has a little over 100,000 miles on it.
View 14 Replies
Advertisement
Sons 94 ranger 4.0 4x4 Auto 185k got him to work yesterday but would not start to bring him home. No spark, checked with timing light, and no fuel pressure. Searched and read alot of tips from Pawpaw so I tried a few things with no luck. Swapped the relays around, inspected coil pack and plugs. CEL was not on and goes out while cranking. I have a OBD scan tool but this truck must be too old or I need finding plug. Crank sensor maybe?
View 7 Replies
My son has a 09 Vibe 1.8L automatic and it won't start. Among other things, I also I want to check to see if it has spark and fuel pressure.
First of all, can I check for spark by looking at the signals into the coil packs? I realize that this won't actually tell me if there is spark at the plugs, but I'd like to know if the ECU is commanding spark or not. One of the coil packs was replaced a couple of months ago, so I'm fairly confident that it is OK. And it's hard to believe that all of the rest of them would suddenly have a problem.
As far as the fuel pressure is concerned, I don't see a valve on the fuel rail to connect a standard fuel pressure gauge. I'm assuming that I need to some how tap a gauge into the rubber supply line, prior to the metal line going to the fuel rail, but I'm not sure this is the recommended way.
View 3 Replies
92 GMC C1500 V6
No fuel to injectors, I have replaced pump, strainer and filters. Changed the filter first and ran fine with a few misses (likely no fuel?) then just got the new pump and strainer on today. Again drove fine with a few misses. Got down to the river to fish and went to leave and once again no fuel to injectors, sniffed the vacuum hose and it had no gas smell.
View 18 Replies
My 97 toyota tacoma will not start. have fuel, changed plugs, has spark. still will not start.
View 2 Replies
i have a 1991 s10 2.5 liter that will not start. i have spark, and fuel to the injector but nothing from the injector. how do i determine if the injector is bad or something is not telling it to spray?
View 1 Replies
I have a perplexing problem and I'm at wits end trying to figure it out. I have an 03 GTI 1.8t 20th. The car has been running great until today when I replaced a few bolts with the front bumper and replaced a motor mount bolt on the passenger side mount. Everything was great until I did the work on it. I figured I had bumped the cam position sensor so I swapped it out for a new one and nothing still. I have verified I have spark and I definitely have fuel as it keeps drenching the spark plugs. I have cleaned the spark plugs and tried starting only for the car to violently sputter and misfire. No codes are being recorded and nothing else has been touched.
View 9 Replies
Freshly rebuilt 2.8 V6
Car turns over but is not getting spark or fuel. The timing is good (checked multiple times, and I have done numerous TBs on these engines). Compression is good.
The car has sat for ~2 months. It broke the timing belt (and bent or broke multiple valves), so I know it had both spark and fuel before this.
I have gone through and double checked every connection and everything is connected and seated properly. I used a stethoscope to listen to the injectors and there is no click during cranking, and using an extra plug I checked spark and there is none. I also hooked up my inductive timing light and it doesn't sense a spark.
I have VAG-COM and there are no fault codes. I have checked all fuses and they are good. If I do the tests on VAG-COM I can make the injectors cycle, but they don't cycle when cranking. I tested the crank position sensor (and tried a new one) and it tested good (and the new one made no difference). Using VAG-COM, I confirmed that it does sense the engine RPM when cranking. The battery voltage stays above 12V during cranking as well.
A couple other tidbits of info:
The fuel pump does work (and comes on when cranking... confirmed by disconnecting the hose and pumping fuel into a can)
When cranking for a few seconds, the display says STOP and flashes the oil light (I'm assuming because it is cranking at such low RPM)
The Check engine light and EPC light come on when the key is put in the on position and turn off during cranking (like they should)
The immobilizer light comes on for a few seconds as well, but it doesn't flash like it would if it was immobilizing the engine.
After looking at wiring diagrams, it appears that the ignition coils and the fuel injectors both run off of the same relay, but I am unsure which one or even if I am right about that. But assuming I am correct about that, wouldn't the injectors not fire during the test if that was bad?
View 4 Replies
I've been experiencing this problem ever since I bought my '90 C1500 305 but its recently gotten worse. After long trips (over 100 mi) the truck refuses (will not even crank) to start for at least 5 minutes following shutdown. Now, it will intermittently not start for 15 minutes following shutdown after shorter (~10 mi) trips unless it gets a jump, which is strange considering the battery is not run down.
I first thought it was a bad contact in the ignition cylinder, but I noticed that the batt voltage would always droop when turning the key to start, so I guess that the ignition is being applied. Now I'm wondering if the starter motor might be bad?
It's a weird problem to have, I am 100% certain the truck will start if its cold. But after a long trip it just flat out refuses, will not even crank.
View 11 Replies
Working on my buddys 2003 camry, wont start, has air and spark and not getting fuel. replaced fuel pump already. If you hit it with a quite a bit of starting fluid it will fire up for a few moments and then die out, its got half tank of gas. The whole start of this is he ran out of gas and since then wont start.
View 7 Replies
I have 06 F150 5.4L with a no start condition. The truck comes from another shop with no improvement. This is whats done so far, replaced plugs, checked the fuel control module 100% ok, we have fuel pressure at the rail, we have injector pulse ( niod light ), we have spark and we have a good battery. We tore down the timing cover because of the sound of the engine turning over like it was out of time when cranking.
We did find a tensioner totally destroyed so we replaced the timing as put it back together and replaced the oil pressure switch because we get this "low oil pressure" in the info center every time, we also get gray/black puffs of smoke out the tailpipe when turning over. So to sum it up we have spark, fuel, and battery and still nothing! We even flashed the ECU and still no fire/no start.
View 3 Replies
It is a 1991 C1500 2wd, ext cab, short bed 5.7L engine with about 300k miles on it that I have had for a year. Supposedly a different 350 engine and transmission was put in a couple years ago.
This problem has been going on for 2 weeks. I'll start the car up and it runs just fine, no problems. After driving for about 20 minutes, the engine will die while driving, and will not start back up until the next day. I have sat in the car for literally 4 hours patiently waiting for it to start. I'll turn the key and the engine will rotate, but will not start. When someone shows up to give me a jump after the battery gets low, it will not start. I'll go home and go to sleep, and sometime the next day I'll go to my truck, and it will start back up, and I'll drive back home, and I'll make it as long as it takes less than 20 minutes.
It is not just a "morning problem", but a "first time I have started the truck that day" kind of problem. Last week, it happened to me in the mornings. On Saturday, I didn't leave my house until 2pm and the problem happened. Today, I first drove it at 8pm, and the problem happened.
Things I have changed so far (mostly from Autozone):
Starter - burnt it out when it first died 2 weeks ago, now I know not to crank when below 9 volts - lifetime warranty
Spark plugs - no more engine popping or driving with 2 feet - changed last week on Tuesday - AC Delco CR43TS gapped at .035
plug wires - changed all in November, since I noticed one of the old ones was tore - lifetime warranty
Distributor cap and rotor - changed last month when the engine started popping - autozone
Ignition control module- I changed today, I really thought that would fix the problem after speaking with the Autozone guy - lifetime warranty
Ignition Coil - changed last month because of popping
Fuel Filter - changed last Thursday, thinking it was a fuel problem
Here are some of the other symptoms I have been noticing over the last couple months:
Pretty bad gas mileage, I know it is a V8, but it is just as thirsty when I am not carrying anything as when I am pulling a car. A couple months ago, after driving for about 30 minutes or so, the engine would make a "Pfft" noise and would start popping and I would have to drive with 2 feet to keep the engine running.
View 14 Replies
The truck just quit having any throttle control which seemed to be ignition. Way old stuff needed replacing so I went after that. Installed complete new distributer, coil and spark control module. No good. Found spark using checker but not sure what this should really look like. While checking compression found a lot of fuel coming out of number 6 cylinder and nothing out of any of the others. Compression in all cylinders is around 120. Distributor timing at number 1 TDC looks good. I am thinking some fuel system related issue but cannot figure out why so much fuel comes out of the number 6 cylinder.
View 3 Replies
I brought the car home last night and shut it off. This morning went out and engine will crank but doesn't show any signs of fuel or spark. Removed one plug and grounded it to block while someone cranked it. No spark. I dumped a little fuel in the cylinder just to see if I could get it to cough or something, but nothing. I tried looking for blown fuses under hood and under dash but I haven't noticed anything out of the ordinary. I pulled out all relays and tapped them and reinstalled. I tried disconnecting the battery to reset ecu and that didn't work either. There are some relays marked that I don't recognize.
View 12 Replies
Was driving normal and my 2004 r32 died. It felt just like it ran out of gas. Fuel pump was not making any noise. I replaced fuel pump relay and now i can here the fuel pump making noise. Pulled the fuel pump line off and fuel is coming out the line. So now i checked for spark and have none. I have 12 volts at the coils. I ohmed out the crank sensor and have .777 k ohms. I also checked codes with generic snap-on scanner and found no codes.
View 2 Replies
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???
View 3 Replies
so my car doesnt want to start so i am going to check a few things.
first how do i check my fuel pressure or the location?
View 5 Replies
this car is a daily driver and ran very well it has 104,000 miles and well maintained. on a Friday night, it started to rain and my windows were down. my friend volunteered to roll them up and mistakenly left the key in the run position. I was unaware of this until Monday morning so the battery was completely drained. I removed the battery and charged it for about 12 hours until fully charged on a 3 amp charger.
The head lights were bright when I reinstalled the battery but I did not take a voltage reading although i believe it was charged up good.when I went to start the car it did nothing and the fuel pump is not running either. I removed the starter wire from the starter and with a remote starter jumped the starter.. it swirled over fine but no start with the key in run position . it has no fuel pressure and is not getting fire. this car is equipped with an immobilization unit for security.
Is it possible that this caused it to activate? my key also is equipped with a chip I was told by the (stealership) and I only have the one key with no fob to deactivate the security system. my owners manual say I can turn the key to the left in the driver's door to turn off the security also but it has no effect. it is the original key and is very old looking. I have exhausted every hunch I had to get this machine back on the road and I just know one of you tappet brothers is holding the solution to my problem.
View 8 Replies
I have an 03 Sierra Half Ton when the engine is warm it runs fine but at cold start, half the time it doesn't have the fuel pressure to start, i have to turn the key a couple times to build it up. Idk if the fuel pump is weak for if it would be more the regulator. I started having this problem after i replaced the fuel pump. The fuel pressure gauge shows 50-55 lbs, but every now and then when its cold it will only jump to around 5 lbs (but this is only when the engine is cold... why?) What should i go after first? Regulator, new pump, Replace the fuel filter again?
View 2 Replies
I've had this car for a little over a month, when I first bought the car it ran fine, until I drove it home. It stalled out and would not start up again, turned out I had low fuel pressure so I replaced the fuel pump. After this the car had been running fine up until a few days ago. It was stalling out and starting right up, now I am lucky if it will start up. I am still getting fuel pressure to the fuel rail. Would it be my injectors?
View 1 Replies
95 lincoln towncar was running fine all day. made a pit stop later on and the car wouldn't start. previous owner said it would do that occasionally and to let it sit for 20 min. or so. still wouldn't start! released fuel pressure at fuel rail and then the car started just fine and was running like nothing happened! could I be getting too much pressure? also never did get the smell of raw gas!
View 4 Replies
