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78 280z wont run


ryan

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i just got the car yesterday as a christmas gift all original it was running untill it was stored for 15 yrs iv changed the gas, oil, oil filter and i can get it to start up for about 5sec but the min i give gas or any thing it dies, its fuel inject which iv never dealt with them befor

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Fifteen years of sitting will cause a lot of crud to build up inside the tank and lines causing a loss in fuel pressure. You will most likely have to clean out or replace the gas tank. I had to do that on mine and it had only been sitting for four years.

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Fifteen years of sitting will cause a lot of crud to build up inside the tank and lines causing a loss in fuel pressure. You will most likely have to clean out or replace the gas tank. I had to do that on mine and it had only been sitting for four years.

I will second this opinion as there was A LOT of rust build up in my Z's tank when I got it. And it's tank was boiled before it was stored and it stayed in a garage for four years. I probably got out two full hand fulls of rust.

If this doesn't work there might be a wiring issue, but since you Z runs then cut's out, it is a fuel delivery issue. The fuel injectors might also be an issue since they are fairly old.

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When you drained the gas what did it look/smell like? Was it kind of dark brown? More than likely you'll be doing some work on your fuel tank shortly...crud...crud...and more crud from all the years storage. Good news is you can send it out to be done or you can do it yourself...Do a search on fuel tank renu if you want to send it out...

webdawg1

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I just went through the exact same problem and when I got it to start as soon as you touched the gas pedal it would die. the problem I had was the rotors in the fuel pump were stuck in place. Check your fuel pressure just after the filter and you should have arround 36psi. It won't rum worth a dam on less than that. If you take the pump appart make sure you mark it and put it back together properly. It's easy to mess up the location of the center disc so match mark all parts. I have old posts on this check them out. Also print yourself a copy of the Fuel Injection bible. I don't have the link for it but do a search and you will find it here. Good luck

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I just went through the exact same problem and when I got it to start as soon as you touched the gas pedal it would die. the problem I had was the rotors in the fuel pump were stuck in place. Check your fuel pressure just after the filter and you should have arround 36psi. It won't rum worth a dam on less than that. If you take the pump appart make sure you mark it and put it back together properly. It's easy to mess up the location of the center disc so match mark all parts. I have old posts on this check them out. Also print yourself a copy of the Fuel Injection bible. I don't have the link for it but do a search and you will find it here. Good luck

Not trying to sound like a 'doom sayer' but I'll bet your car wasn't sitting for 15 years when you developed that problem. I'd like to reitererate that you tank is most likely toast and that's what you need to look at. After I had my tank cleaned the car fired up and has been running right ever since with the original, untouched fuel pump. Check into the tank first. My experience says that your fuel pump is probably okay.

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  • 2 weeks later...
If he's satisfied with that as the fix, I think we're done here.

I agree, but it still doesn't take away from the fact there WILL STILL BE STUFF in the tank, which will cause problems later ...

Ryan, everyone here will help out in any way they can, and people here have been wrong in a diagnosis on before. The website is a Wikipedia of car knowledge, experience, and mechanics ...now that the car is running, make sure to drive it at least once a week (Z cars like to be driven) and if you have the time focus on one weekend project each week day (drop the tank and have it cleaned; replace fuel filters; clean, test and if necessary repair electrical connections). Your Z will thank you, you will have less trouble with the car and spend your time enjoying the car and not having it being repaired or stressing over it's problems.

A Z is always a great present! PS: I would also suggest you drive the car around for a while, 3-6 months, before you start any major restoration/renewal. Also start a list of things that you notice that need to be repaired.

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I had a digital memo thing (the kind that takes multiple memoes) velcroed to the dash for the first few months after I got my car. I had a few things that needed immediate repair, but otherwise, if I noticed something, I just presssed the record button and spoke (yelled?) a message formyself, and later wrote the messages down in a notebook when I was home.

Either that, or carry a small notebook & pencil in the car. You might need to give your number to some beautiful girl! or Z friend.

thx

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