R33 Wont Start All Help Appreciated

[boxer666]

hi guys iv searched the forums here and around the net and couldn't find anything to help me so hoping someone here can

I have a 1993 r33 gts25t. its stock under the hood besides a fmic, nismo fpr (coz stock one died n couldn't get another one), hks bov and a pod filter

I don't drive it to often so started it in the shed n let it idle to put some charge in the battery. it was running fine then the idle started to fluctuate slightly then it stalled I tried to start it n it turns over but wont fire up.

I have limited mechanical knowledge so I checked all the basic things its got spark its getting fuel all the fuses and relays are fine.

so following info I found on the net of things that could be the problem iv replaced cas, afm and ignitor and still no luck.

any info or suggestions would be greatly appreciated Thanks Heaps

[old grant]

Hi Boxer, how did you test the fuel and spark, coz if its got them two it should go

[boxer666]

fuel I pulled off the return line n injectors clicked when I rotate the cas and the plugs where wet when I pulled them out and spark I removed the coil packs and plugs one at a time n placed the plug in the coil pack and earthed it to a battery with a jumper cable and had a mate turn the key.

I just read on here that one guy found even though the plugs fired out of the engine they where still to weak to start the car so ill try replacing the plugs tomorrow.

[old grant]

I had a problem like this before an it was the power supply to the coils, It red fine with a volt meter but had no current, to check this get a headlight globe pref. 100w , find the power wire on the coils-remove all the plugs off the coils to confirm the power supply wire see if it glows the bulb bright like a headlight-if not you have found your problem area. Is it the model with the ignitor at rear of engine or do the coils have inbuilt ignitor.I think 93 has the ignitor.

[boxer666]

yes it has the ignitor at the rear of the motor atop the coil pack cover

I checked the power supply to the coil packs like u said an it is fine the bulb was blinding lol

this first happened a few months ago but haven't had the time to work on it till now I thought I was getting fuel then but after closer inspection to day it looks like there's fuel in the feed and return line but its not making it to the cylinder coz the plugs are bone dry now after cranking for 5 seconds

[boxer666]

discovered iv got no power to the injectors checked all the wires and earths and is all good so and everything else appears fine fuel pressure, spark, injectors them selves. So im thinking its a problem with the ecu.

is this a likely possibility???

[500hp]

Get a new battery lol sounds like a joke but try it. Works a gem

[500hp]

If the injectors click they have power.

[500hp]

Sounds like the ingnitor is a bit faulty

[boxer666]

got a new optima battery and a new ignitor

[DVS JEZ]

if the plugs are wet then the injectors sounds like theyre working.

did u only jist install the fpr? sounds like the pressure is too high and u have fouled the spark plugs.

get some new spark plugs and set the fuel pressure to 43.5psi when the pump primes. then see if it starts

[boxer666]

hey plugs where wet when It first happened but are bone dry now

I put new plugs in and the fuel pressure is set at 43.5psi

I spoke to the mechanic at the local Nissan dealership said it sounds like the ecu but when I asked if I could ring it in there he said they not interested in working on it :-(

so I got another ecu do I just unplug the old one n plug in the new one or is there other steps to replacing it ???

[500hp]

Battery and ignitor !!!

[DVS JEZ]

yes. just key off. literally just swap it

[500hp]

If I here ecu one more time I'm gonna burst into laughter, I have seen r33 ecu,s cooking when my mate reversed the polarity to his battery for 2 minutes. There was smoke coming out the engine bay then he swapped it over and it fired right up please accept out information, it is your battery or ignitor unless a magpie got stuck in your alternator and the battery didnt charge properly.

[boxer666]

changed the ecu and it fired up straight away :-)

Thanks to everyone for your help

[500hp]

Maybe u should show us and explain to us about this so called ecu. that was stuffed? I'm keen to learn from this considering your car blows a fuse before your ecu even gets a chance to short ?

[500hp]

Must have spilt a cup of hot coffee inside your ecu mate !!

[boxer666]

dude idk y it stuffed up but it seems like ur looking for a fight so send me ur address and ill come over n we can go a few rounds

[500hp]

No need to be hardcore dude lmfao