help 280z still will not start

[chris frizzell]

hi all can i pick your combined brains . still having wows with my 280z had the car running a little back but having a few problems with it now . this is where we are at
1 new dizzy so great spark
2 got good fuel pressure 36psi minimum
3 fuel at the rail with out injector on
4 with injector on no fuel spray fron injectors
the only thing i can think is that the ecu is bust as i have power to the fuel punp relay . got 2 relays 1 new 1 original . my plans to go to donnington are up in smoke its been one problem after the other . if i didnt enjoy trying to fix the thing i think i go mad or is that just restoring a 44 year old car . it still look cool as hell thow.
on another matter can anyone recommend an adhesive to stick my tailgate weather strip had a go two time with so called glue ,it stick to the body but not the body and the rubber . if anyone needs someone to remove glue ian your man world expert . hope somebody can help as i may have to take it to someone how actually know what there doing .the only problem with that is that iam from Yorkshire so spending money on mechanics bring me out in a rash . if anybody has gods address please pm me thanks chris

 

[jonbills]

This is the sort of stuff to stick your weatherstrip.
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/152921843494

For making the engine run, I can only recommend the troubleshooting in the FSM again.

 

[chris frizzell]

yeh had a look at that have it downloaded on my laptop. dont fully understand it may have to go down the pro route as a cant be trouble shooting this for months . but the adhesive you recommended i have just got off ebay for £15 all in .it would be fratastic if someone had a working ecu i could lend to see if it the problem . i can get a ecu for about £120 but it may be better to send it to a pro and conferm the fault . getting a little frustrated as ian gagging to drive the car and dont want to get bogged down with things above my skill set . thank you for your reply chris

 

[Mr.G]

I thought I could help you out by lending you a 280ZX one but looks like they are different. Hopefully someone with a 280Z can come to the rescue.

 

[chris frizzell]

hi many thanks for the offer been to see the pro and he said to have it tested so gave me the number of a tester .ring them up and they say its way to old for them to test it so back to square one again . mechainics away for two weeks so do i wait and pay for him to test the ecu or do i bite the bullet and get a used one from the state ? the only good part to this story is that ian building a great amount of future spare parts . the only other sulution is A . replacement full ecu systum .B swop to carbs .C gallon of petrol and a match but the latter is a little over the top . will keep going from the patron saint of travel st christopher ( good job god didnt need a lift from a man with a dodgy datsun ,but maybe he a good mechainic ) chris

 

[Mr.G]

I would put a wanted ad up... there is hopefully someone on here that may have one for you to lend...failing that try the Facebook page....datsun parts Europe and worldwide...

If you discover that a 280ZX one may work..give me a shout..

 

[Mr Tenno]

I know nothing about EFI but there's no chance it's a bad ground or poor connection somewhere or anything like that is there? Might be worth going over the whole system including the ECU with a multimeter to check - it only takes one accidentally snagged wire or ground wire that's come loose to mess things up.

 

[MaximG]

Chris are you in Hatfield? If you would like another pair of hands I would be quite happy to pop down as I'm only in Stevenage.

Drop me a pm if your interested.

 

[chris frizzell]

hi thanks for the posts going to have a look over the wiring this weekend . thanks for the other to have a look a my motor but ian in the other hatfield in yorkshire wish it was nearer

 

[Huw]

Hi Chris

Not sure if i have sent you this link before.

280Z/ZX Electronic Fuel Injection Guide

The link is for the EFI system for a 280Z.

Good step by step guide for 'car won't start'. Also how to check your ECU.

If you have a EFI system from a 280ZX, they are similar enough but with a few other bits.

I will see if I have a PDF version of that manual.

Huw

 

[chris frizzell]

thanks for that downloaded to my laptop bought one from the usa in 100% working condition plan is to fit that one and see if it runs . if it dont run i can eliminate the ecu and i have a spare on but at this rate i will have a spare everything may even set my own shop up haha many thanks for the advice chris

 

[Huw]

Quick question.

If your system is off a 280ZX:

Does the fuel pump come on when you turn the key and stay on when the engine is cranking? You should hear the fuel pump buzz then stop to pressurise the system at the first key position, then turn back on as you turn the key to start the engine (starts to crank.)

I ask because if there is no signal from the oil pressure switch (signals oil pressure present) when cranking, the fuel pump will not run (for a 280ZX).

Huw

 

[Makesy]

Hi Chris

Not sure if i have sent you this link before.

280Z/ZX Electronic Fuel Injection Guide

The link is for the EFI system for a 280Z.

Good step by step guide for 'car won't start'. Also how to check your ECU.

If you have a EFI system from a 280ZX, they are similar enough but with a few other bits.

I will see if I have a PDF version of that manual.

Huw

If you right click your link and 'save link as' you can save it as pdf

 

[chris frizzell]

hi all more tails from the river bank . had another fun fulled weekend with the datsun .hers where we are thanks to the download we have checked every single electrical part on the EFI and the reusults are . EVERYTHING WORKS . so to that conclution the only part which is not is the ECU . will keep you up today as 100% working one is on its way from colarado thanks chris

 

[Makesy]

Interested to hear how this pans out Chris (hopefully for the better).

I have an L28 and will be fitting the ez-efi system when it arrives from Z car depot in a few weeks.

My system is missing several sensors and the wiring is questionable at best.

I have had the car running briefly a couple of times but recently my injectors decided to stop firing on startup. I have yet to troubleshoot properly but I'm sure it is a loose connection or bad earth somewhere.

For what it's worth, I'm not far from you (Leeds) so could be nice to meet a fellow Zed'r in the area when you get up and running!

 

[chris frizzell]

my car was running sweat but at some point in time i think its been jump started a big no no .nether do it !! always use a fully chargerd battery . your ez efi looks interesting was it expencive ? i would be great to meet a fellow datsun fan i will keep you informed on progress if this works car should be done by late May datsun god willing . to be honest go through the check list in the 280z efi bible and you will find the problem was i little funny about it but it works .like to see the new efi when you have fitted it drop us a PM chris

 

[chris frizzell]

hi all still waiting for the new ecu but been on a us web page and found that if your tachometer is not working it won,t send i signal to the ecu . is there a check for the tacho ? moves when cranking the engine but can i test the electrics . thanks chris

 

[Huw]

Sure you’ve not fried you ignition module on the dizzy when you jumped it? It’s about the only Chip in the whole system. Not sure about the tacho. Have you read how the EFI system works in the manual I sent you a link to? It gives you all the inputs to the ECU.

 

[chris frizzell]

thank for the reply. car wouldht start before i fitted a new dizzy. vacuum was bust on the old one . tested parts on the efi bible all systems are working ok . the only part to fail is the efi . someone on a US web site said it could be the tacho ? hope the new ecu fixs it thanks for the down load chris

 

[chris frizzell]

more tails from the unexpected . after checking cleaning panicing and thinking that all my childrens inheritence is going on car parts . today was the last day before the sad car was going to see the pro . but no the bloody thing is running like a rolex and my nervous brake down is on hold . only wish it was 4 week back thanks to all how have help regards chris