Need some ideas, car starts and stalls, fuel problem?
I have an 86 RX7 I'm working on for someone. Car has 16K miles and has basically sat for about 20 years. I thought the engine was locked up, but since the trotle body was loosened mice got in and stored seeds in one of the rotors.. Anyways, everything has been taken apart cleaned and put back together. Changed the tank, pump, fuel fitler, rebuilt fuel injectors, changed all fluids. Just swapped out the fuel regulator with one off a running car. I'm getting spark, plugs and wires are in the correct spots. I really think it's not getting fuel. It will start for about a second and sound good, but then dies. I have the air cleaner hose off because the electric air duct under the air filter seemed seized up. But everything is still plugged in. I guess the next step is to check if the injectors are getting power? I haven't ever done this, if you agree, do you know how? Is there anything else that could be shutting the car down instantly? I had all four plugs out to see if I had spark, and the mist that was coming out of the engine while turning it over didn't smell like gas. I have had MMO sitting in the engine, so I'm thinking it's mostly that. But I should be smelling some gas too, right? Thanks for any ideas.
bob |
welcome to the board. :)
double check the fuel lines and make sure they are not reversed. |
Try jumpering the fuel check connector. And did you accidentally mix the supply and return hoses upon reinstalling the engine?
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Thanks for the help. I don't think the lines are crossed. I thought of that today and tried reversing them and that didn't help, and actually it was worse. I did have the tank out and the engine out, and I replaced some of the. hoses while everything was out. the fuel is going through the line with the filter to the engine, so that should be correct.
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I will be working on it again tomorrow and will give you an update.
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Originally Posted by satch
(Post 11499833)
Try jumpering the fuel check connector. And did you accidentally mix the supply and return hoses upon reinstalling the engine?
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sounds like a decent sized vac leak, have you double checked all the hoses
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The check connector is part of the Emission harness and located between the passenger fender well and the engine. Likely it's hidden under the harness and is in a Black rubber boot. Connector is Yellow and has but two wires. One should be Brown and the other Black.
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Originally Posted by schaft
(Post 11499943)
sounds like a decent sized vac leak, have you double checked all the hoses
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Originally Posted by satch
(Post 11499949)
The check connector is part of the Emission harness and located between the passenger fender well and the engine. Likely it's hidden under the harness and is in a Black rubber boot. Connector is Yellow and has but two wires. One should be Brown and the other Black.
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It does have fuel returning to the tank. I jumped the fuel pump wire, with the fuel pump running the car still stall out the same. I also disconnected the fuel line from the regulator and fuel did come out of it. I guess if it didn't, the pulse dampener might be bad?
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this is the problem from what I can see:
" It will start for about a second and sound good, but then dies. I have the air cleaner hose off because the electric air duct under the air filter seemed seized up" .. are you referring to the Air Flow meter?..If that flapper is stuck then your car is not going to get fuel correctly. |
Originally Posted by misterstyx69
(Post 11500201)
this is the problem from what I can see:
" It will start for about a second and sound good, but then dies. I have the air cleaner hose off because the electric air duct under the air filter seemed seized up" .. are you referring to the Air Flow meter?..If that flapper is stuck then your car is not going to get fuel correctly. bob |
Bob..if you got the AFM off the air box,and look into it.that flapper should be like a "little trap",that the door opens and closes.
I have found one seized up on me before.. IF you take the little phillips screws off the thing you can get hit that flapper with some Sandpaper and lube to get it moving again. The aluminum corrodes the parts around the flapper and makes it stick or seize. BUT check to see it is Moving FIRST..If it IS then it is NOT your Problem. Ps: not responsible for any "guesses" uttered!!! |
OH!..another thing..make sure the AFM is connected to the harness and the AFM is on the air hose and the air hose is hooked up to the throttle body.
The Afm needs to meter air to the Tb and then the TPS and AFM can work together to tell the ECU what fuel the engine needs. |
Originally Posted by misterstyx69
(Post 11500220)
OH!..another thing..make sure the AFM is connected to the harness and the AFM is on the air hose and the air hose is hooked up to the throttle body.
The Afm needs to meter air to the Tb and then the TPS and AFM can work together to tell the ECU what fuel the engine needs. bob |
It should push very easily,seeing that air flow will move it.
If it does not move with a "finger weight' on it then you need to attend to it. |
Originally Posted by misterstyx69
(Post 11500444)
It should push very easily,seeing that air flow will move it.
If it does not move with a "finger weight' on it then you need to attend to it. |
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