Fuel problems!

[iamwesley]

Today I replaced my exhaust manifold on my SR with a ssautochrome one. I drained the radiator fluid before and forgot to put some back in. Ok well I was driving to pepboys for about 3 minutes until I looked at the temp gauge and it was at full HOT. So I pulled over and went to buy some radiator fluid. Then I put some in and started my car and it wouldnt start. The motor cranks but doesnt fire. I took out the spark plug and I didnt smell any gas on it, It was basically dry as if the gas didnt spray on it. I checked the Fuel Pump fuse in the engine bay box and it was fine. Anyone have any idea what the problem could be?

[Mr. Badlose]

Mr. Headgasket probably went bye-bye.

[Kid Zelda]

You do not have a fuel problem.

It will not crank over becuase there's not enough compression

Like ^^^^ Mr. Bladloose said, head g a s k e t .. b y e b y e

[iamwesley]

You do not have a fuel problem.

It will not crank over becuase there's not enough compression

Like ^^^^ Mr. Bladloose said, head g a s k e t .. b y e b y e

Like I said if you read the post. The motor cranks which means its getting compression. But doesnt fire. Theres no fuel getting to the spark plugs.

[Mr. Badlose]

I always thought a motor could crank because the starter was driving it, regardless of compression.

A motor will crank without compression, but won't start.

If you really think it's fuel, pull of your line and turn on the ignition, make sure you aren't smoking when you hold it though.

[orion::S14]

Motor cranking means the starter works...doesn't mean it has good compression.

Get a compresison gauge, check the compression. If that's OK, then start looking at fuel pump fuse, ignitor, stuff like that.

- Brian

[idlafie]

Like I said if you read the post. The motor cranks which means its getting compression. But doesnt fire. Theres no fuel getting to the spark plugs.

Have you tried pulling the fuel line after the fuel filter & seeing if you are getting any fuel coming out when you have someone turn the ignition key from OFF to the ON position....(SAFETY NOTE...make sure the gasoline is pouring/pumping into a sufficiently sized container to catch all the fuel spurting out...also make sure you are in a outdoor well ventilated area AWAY from any open flame)
If you are getting fuel out, then check your fuel pump regulator. If not, then check your fuel pump and fuel pump grounds. Also, check your ECU....I've heard of situations where the ECU will not send out a ground signal to the fuel pump. Why??...I have not clue....all I can think of is some sort of internal failure in the ECU's fuel pump ground circuit.
You might be able to bypass the ground signal from the ECU by running a secondary ground to the fuel pump totally bypassing the ECU. Someone I know did this when he was having ECU problems with his fuel pump. Other option is to try swapping out the ECU with a good one that's known to work. That way you'll know if it's a ECU problem or not. If it's not a ECU problem then chances are you have a bad ground wire somewhere on the fuel pump circuit.
Oh...almost forgot...did you check the fuel pump relay? On a S14 it should be located in the driver's side kick panel area underneath the fuse panel. Check to see if you didn't blow a fuse or if the relays working properly. If you're lucky it'll just be a bad fuse or relay. Try that first before you go thru all the other hassle.
Good luck!!!
ID
'95 SE
:coolugh: :faint:

[iamwesley]

Have you tried pulling the fuel line after the fuel filter & seeing if you are getting any fuel coming out when you have someone turn the ignition key from OFF to the ON position....(SAFETY NOTE...make sure the gasoline is pouring/pumping into a sufficiently sized container to catch all the fuel spurting out...also make sure you are in a outdoor well ventilated area AWAY from any open flame)
If you are getting fuel out, then check your fuel pump regulator. If not, then check your fuel pump and fuel pump grounds. Also, check your ECU....I've heard of situations where the ECU will not send out a ground signal to the fuel pump. Why??...I have not clue....all I can think of is some sort of internal failure in the ECU's fuel pump ground circuit.
You might be able to bypass the ground signal from the ECU by running a secondary ground to the fuel pump totally bypassing the ECU. Someone I know did this when he was having ECU problems with his fuel pump. Other option is to try swapping out the ECU with a good one that's known to work. That way you'll know if it's a ECU problem or not. If it's not a ECU problem then chances are you have a bad ground wire somewhere on the fuel pump circuit.
Oh...almost forgot...did you check the fuel pump relay? On a S14 it should be located in the driver's side kick panel area underneath the fuse panel. Check to see if you didn't blow a fuse or if the relays working properly. If you're lucky it'll just be a bad fuse or relay. Try that first before you go thru all the other hassle.
Good luck!!!
ID
'95 SE
:coolugh: :faint:

Ok I checked the Ignitor.. Its fine... Also When I try to start the car. I cant hear the fuel pump prime anymore. I took out the fuel pump and tested it on my brothers 240 and it worked fine. So Im guessing I blew somthing with the fuse. Any Ideas?

[Mr. Badlose]

See if oil & coolant have mixed. If so, it's the headgasket.

When the shitty stock temp gauge reads at full hot, and it's there for a while....you have been putting out some serious heat.

I had an exhaust leak melt wires together once, but I don't think a really hot engine would do the same...

[Kid Zelda]

Like I said if you read the post. The motor cranks which means its getting compression. But doesnt fire. Theres no fuel getting to the spark plugs.



As I said, I did read it.
Yes, a motor can crank over.. sound like its about to start .. then disappoint you. Why, not enough compression to start the big BOOM in the cylinders.

I see no reason why the fuel pump, injectors or a fuse would go out.. just to make sure... go ahead and check if you are getting fuel :wiggle:

Now do a comp' test, tell us the results

[Kid Zelda]

See if oil & coolant have mixed. If so, it's the headgasket.
Not always the case, you can blow the HG and not have the fulids mix.

It's definily a sure thing if they are mixed though.