Aurora 4.0l / Izuzu 5 speed swap into 88 coupe (Page 89/102) Bloozberry AUG 17, 02:08 PM quote Originally posted by RCR: Too slow. Bob You're not going to get any sympathy from Charlie. cptsnoopy AUG 17, 07:05 PM Other than to say, I know what you mean Bob! I've been working on aligning all 4 wheels. The rear wheels are done with -1 degree of camber and .15 degree toe in each side. All done without any special tools other than a tape measure, a reference string between 2 jack stands, a protractor and a bubble level. The bolts just need final torque. The front passenger side is finally set to 5 degrees of castor and 0 degrees of camber. The toe in is close but I'm setting up the reference string now to set it properly. I'm not too sure it'll be correct as I needed to remove the sway bar links to keep the sway bar from hitting the alignment tool and the front end is sitting a little higher than it was. The objective is to get it close enough to drive without unnecessary tire wear. Charlie cptsnoopy AUG 18, 05:14 PM I tried a couple laps around the block today and feel that there is likely an issue with the fuel system as I was having a lot of trouble with going lean. This condition has been becoming more noticeable of late even just idling so I'm thinking that the fuel tank has become contaminated again. It's been just over 6 years since I knocked most of the nasty rust-dust out of it... I will change the filter first to see if the current filter is clogged or has a substantial amount of rust particles in it. Then I'll hook up a pressure gauge and see if the pressure seems stable through some throttle blips. If all that checks ok then I'll give tuning a try again. On a more positive note, the steering felt pretty good. Charlie cptsnoopy AUG 19, 01:09 AM Changed the fuel filter. Was surprised to see the filter element flopping around in the old filter. The fuel residue was pretty clean but there was a slight rust tinge look to the fuel that drained out of the old filter. I hopped in the car to take my wife for a short drive around the block and it was acting the same as before. It wasn't until I was reving the engine a little to back it into the garage that it occurred to me. The exhaust note was much louder. I tucked it away in the garage until I have time to look it over but now I'm convinced that my homemade exhaust has cracked open and is playing havoc with the O2 sensor. If so, I'll likely drop the cradle and have a professional weld up the system properly. Charlie RCR AUG 19, 06:41 AM If it's not one thing, it's another...Good luck... Bob Bloozberry AUG 19, 11:14 AM cptsnoopy AUG 19, 08:04 PM lol, yessss. disaster! Anyway, over dramatic I suppose. I jacked the car up and did a cursory inspection of the exhaust and was happy to not find any issues. (whew!) If there are any, they are hiding.... So, I hooked up the fuel pressure gauge and got a consistent 43psi each prime. Then I started the engine and it dropped to a steady 38psi. I blipped the throttle and held different rpms and the fuel pressure fluctuated between 35-38psi. next, I am going to remove the vacuum line to the regulator and check again. The fluctuations between 35-38 were not following the throttle blips as I expected. The pressure did not just drop away when I quickly opened the throttle. I still may need to drop the fuel tank but I will fiddle with it a little more first and I will also look at the Aurora book to see what they say... Charlie cptsnoopy AUG 20, 12:01 AM I pulled the vacuum line off the fuel pressure regulator while the engine was running and the pressure jumped back up to 43psi. I will need to figure out if it is hooked up to the correct vacuum source... The engine is running on 6 or 7 cylinders and that just started the last few times I have run the motor. When I opened up the original Fram fuel filter I found that the element had separated and was not filtering any fuel at all. That leaves me with two likely possibilities, clogged injector screens or a failing injector driver in the Holley 950. Only the number 7 plug was easily accessible and it looked really good. There may be fouled plugs but I am leaning towards fouled injectors. I used a timing light and was able to pick up a spark signal from each of the 8 plug wires so I am thinking the coil packs are ok. In the morning I will remove and take the injectors to the local shop for cleaning and flow checking. If they are not the problem then I will try a noid light on the injector harness to look for a burnt out injector driver. So close to driving... Charlie RCR AUG 20, 09:03 PM Bob cptsnoopy AUG 21, 12:14 AM quote Originally posted by RCR: Bob Yesssss! I got both my new and old injectors cleaned and flow checked today. If the flow sheets are accurate I'll be surprised if the cleaning makes much difference. There was improvement noted but not enough to cause 2-3 cylinders to not fire. Now that I have the air plenum off, I'll check the other seven plugs tomorrow before I try running it again. If the engine is still missing badly after that I'm afraid that maybe the Holley injector drivers are going bad. Same thing happened to Russ544. Crossing fingers. Charlie