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Anyone here into old cars?
- Thread starter 7dollarbologna
- Start date
That, along with the 5 speed and turbo, it really is a fun car to drive. Made in Germany, the build quality is high. An easy mod is to increase turbo boost and add an intercooler. 175 HP is stock, but 400 ponies are at hand with off the shelf parts without having to touch the short block.
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I should have this one back on the road within a week, after 3 years of down time...need to replace one fuel injector (this evening) and get a temp license so I can get it emissions tested and permanently licensed.
Unfortunately the steering rack leaks, so I have another project coming soon. I've had the car for 26 years and it's my 4th Datsun Z-car ('70, '76, '82 and this '83) , so I know how to turn just about every bolt on it. The Nissan dealer is superfluous when I've been working on them longer than anyone there.
Unfortunately the steering rack leaks, so I have another project coming soon. I've had the car for 26 years and it's my 4th Datsun Z-car ('70, '76, '82 and this '83) , so I know how to turn just about every bolt on it. The Nissan dealer is superfluous when I've been working on them longer than anyone there.
I would love to have an early 70's 240Z. I don't think there are that many left out there as I rarely see one on the road around here in L.A..I should have this one back on the road within a week, after 3 years of down time...need to replace one fuel injector (this evening) and get a temp license so I can get it emissions tested and permanently licensed.
Unfortunately the steering rack leaks, so I have another project coming soon. I've had the car for 26 years and it's my 4th Datsun Z-car ('70, '76, '82 and this '83) , so I know how to turn just about every bolt on it. The Nissan dealer is superfluous when I've been working on them longer than anyone there in L.A.
Ah, horse dookey. I got the fuel injector replaced last night and the 280ZX is still running rough.
The joys of older cars....at least this is something I ought to be able to diagnose. No codes, just use your head and look for clues.
Logic: a miss is either fuel or spark. I used a mechanic's stethoscope to check and all six injectors sound like they're firing, although the replacement one is a bit quieter than the others. It's a different brand so that may or may not explain it.
I guess I'll start checking the spark side. It's not hard to pull the plug wires individually at the distributor and see if they're all getting spark.
The joys of older cars....at least this is something I ought to be able to diagnose. No codes, just use your head and look for clues.
Logic: a miss is either fuel or spark. I used a mechanic's stethoscope to check and all six injectors sound like they're firing, although the replacement one is a bit quieter than the others. It's a different brand so that may or may not explain it.
I guess I'll start checking the spark side. It's not hard to pull the plug wires individually at the distributor and see if they're all getting spark.
same cylinder mis-firing all the time ? How are the valve springs on the affected cylinders ? Might want to look at those
just re-installed the head after some valve and other work. I checked springs carefully and they're good.
I'm not sure it's #4 still misfiring. More detective work to do, and it won't hurt to get fresher gas into the car too.
pull the plugs, they might tell the story. Also, with all the work you did/had done... it could be just the timing. I just saw a body guy and a shop helper diagnose a LT1 Vette on Monday with a stuck lifter or a bent valve.... only to have the head mechanic come in Tuesday and spend 5 minutes correcting their 'perfect timing job' to have it running smooth as glass on all 8.
A buddy of mine restores older cars for a living and he restored the body of a 240z for his neighbor. The guy was going to do the engine himself and did a 350 swap but quit working on it, due to poor health, before he got it running.
It's been sitting in his driveway for the past 6 years and I've tried to buy it from him several times but he refuses to sell. Unfortunately, he is never going to be physically able to work on this again so unless he changes his mind, the car is going to rot in his driveway until he dies and his next of kin dump it on Craigslist.
I drive by his house a couple of times a month and it's frustrating seeing that poor car just wasting away for no reason.
It's been sitting in his driveway for the past 6 years and I've tried to buy it from him several times but he refuses to sell. Unfortunately, he is never going to be physically able to work on this again so unless he changes his mind, the car is going to rot in his driveway until he dies and his next of kin dump it on Craigslist.
I drive by his house a couple of times a month and it's frustrating seeing that poor car just wasting away for no reason.
Yes, that is an overhead cam. And the plug wires are all working - checked each of them with an inductive timing light and all plugs are getting spark. All the spark plugs are new, with less than 30 minutes' run time on them. Checked compression and all cylinders measured 105-115 PSI dry, which is well balanced and it tells me there's no indication of a valve problem.
I was a leeeetle worried that when I installed the head I might have tweaked a valve because the cam was out of time with the engine. I pulled the rockers to release the valves while timing the cam so that I wouldn't cause damage by rotating the cam....but there's no evidence of that.
The plugs are all sooty looking, and as much as 25% of the fuel in that tank might be old gas - I've pumped it out a couple of times and topped it off. That is a turbo and a premium fuel engine, and I know it doesn't like bad gas, but this is worse than that.
I think that I might need to pull all the fuel injectors and ship them in for bench and flow testing.
What is your fuel loop pressure ?
An across-the-board over-richness points to a common problem.
Excess pressure in the loop, something out of whack in the cold-start warmup section, bad manifold pressure sensor...
Not familiar with the exact EFI used in that engine but I've seen, heard of, and experienced several issues with Bosch D-Jet and L-Jet injection, as well as the K-Jetronic (CIS) which despite its name has almost no electronics in it. And MFI, which is not electrical at all...
I don't know what spec is for that car, but 105-115psi seems mighty low. You had all the plugs out and the throttle propped wide open for that test?
That 190SL is one of the most beautiful cars that Mercedes eer made. I have always loved those!
And yet, 105-115 PSI isn't super, but at 126K miles on a 33-year old engine, not bad either. All I did was pull the spark plugs, screw n the compression gauge and crank the engine over 10 revolutions per cylinder. Throttle was closed.
I can check fuel pressure, it is worth at least checking off that item.
And yet, 105-115 PSI isn't super, but at 126K miles on a 33-year old engine, not bad either. All I did was pull the spark plugs, screw n the compression gauge and crank the engine over 10 revolutions per cylinder. Throttle was closed.
I can check fuel pressure, it is worth at least checking off that item.
