Please help get sr running.

[stevejames3]

ok heres where im at now. installed the sr. yuri did the harness. i have fuel(took off the fuel rail and injectors were squirting) im getting spark, but very weak. and i kinda have to be getting air. its cranking but not turning over. the mech. timing should not be off sence the head should never have been removed. compression is low in the two back cyl. (130 105 if i remember correctly). i tried starting fluid, but i just got a few backfires. anyone ever seen anything like this? i need to get this running but im not sure where to start. ANY help or ideas would be great. thanks Steve

[curbhuggerrps13]

pull off the valve cover to see if the cam gear didnt snap off...liek what happened on my swap....

[drifter808]

have you checked the timing with a timing light? Did you put in the CAS or did it arrive with it installed? If it came installed it could of been put in at a wrong angle and be 180 degrees off. My engine was like that, took me forever to figure it out then i fixed it and it started right up.

[stevejames3]

well i cant check with a timing light, cuz it wont start. unless i can with just cranking the motor.?

[drifter808]

oh yeah, i forgot about that. You may have to reset the timing. If you have the FSM it will have it in there. If you dont have it download it at zeroyon.com.

[broken240sx]

I had the same exact problem..............

First make sure ALL grounds are connected, this is very important. If that doesnt solve it, read on...

Yuri jerked me too. It was a problem with my harness, specifically the ignitor wiring. I had my DE harness modified, 250 plus 125 for an ignitor, and then I had to remove it once it was installed and basically do it over. Yuri was a douchebag, he stopped returning my phonecalls and was no help at all, Heavy Throttle was helpful with very specific quesions but no one can tell exactly what is wrong with your harness without spending HOURS disecting it.

It was last year, I dont recall exactly which wires were crossed, sorry. I can tell you that if you set the timing 50 million times nothing will change, its pretty easy to set on SRs... and they are pretty easy to get running.

My advice is to (if at all possible) pull a friends harness from their working swap to verify the problem, i.e. get your car started, then dive into your harness. (I used a live wire at the ECU plug and a circuit tester to see where the ECU signals were going, unplug EVERYTHING before that, dont want to ruin a coil or something)

That wasn't what I wanted to hear either, but when its over you'll pretty much be an SR expert, or dead. Good luck, and Ill get back to you with more info ASAP.

With regard to Yuri, everyone seems to have good experiences with him, but I wont recommend him. Also this is the first post on any forum that sounds pretty much like my problem, I searched ALOT.

[broken240sx]

also dont be discouraged by compression numbers B/c you should test that with the engine running as well....

[johngriff]

I always test compression with the engine running. I just start it up, pull the coil pack off, remove the spark plug, screw in the compresion tester... WTF?!?!?

ROFLMFAO!!

Dont be discouraged by the compression? WTF... hmm i dont know, usually bad compresion means bad engine, but i could be wrong.... Either way, it probably will "start" with this bad compression situation.

BTW, try dropping a cap of oil in the spark plug holes, then redoing the compresion test, maybe that might help.... but its not going to start the car.

LETS get car started.

First off.. heres my phone number, call me, im a nice guy, i wont bite (714) 493 0293.

Second.. dont know yuri, im going to assume he's done alot of wiring, and the harness wiring isnt the problem, but, that is the only place to look right now...

A: USed FUc`D harness.

B: Bad Wiring

Did you spec` the wiring yet. the "connection" i would be apt to chek first is the 2 wires on the sr harness into 1 on the ka. This is found by the battery area On the SR harness look for the large guage wire(s). One is Black / Red and the other is Blue / Red. These 2 wires should tie together, then connect to the Black / Red striped wire of the ka harness. It sounds like the connection between these three large guage wires may be bad, this is a "complicated" wiring trick, and the #1 cause in usdm swap for ignition problems/just not working.

YOU SAID that it had "weak" spark. This is my first guess. Weak spark across the board is probably found here, ignitor is kind of an on or off situation, and the coil packs will not have this issue all at once.

Also inspect the wiring around the ignitor/coilpack harness. I just did a new harness/wire job for someone who had a bad/burned up harness from a clip. The used harnesses are getting old and are starting to have more internal problems which are not to easy to find, even with an experienced swap wiring guru.


If the problems continue, purchase a BRAND NEW JDM harness from superior nissan here in california for around $400. Like i said, give me a call, i have free incoming.


John

[broken240sx]

I meant that you wont get accurate compression numbers when testing the engine unless it is running..... I know engines with bad compression generally do start, and of course you should be discouraged by low compression, sorry if I was unclear, and I hope you solve the problem good sirs

[Big Bronze Rim]

Originally Posted by broken240sx

I meant that you wont get accurate compression numbers when testing the engine unless it is running.....

Again you seem to have missed the point. How in the hell are you going to test compression with the engine running? It doesnt work like that.
As to the original poster, I would at least lift the valve cover and make sure that the CAS is installed correctly. It isnt entirely unheard of to recieve an engine with another CAS that was just shoved in and is totally out of time. Shouldn't take too long and you can then rule that out as problem if its correct.