EVO gone CRAZY after service!!!

SiRface · Posted: Sat Nov 21, 2009 9:21 am Post subject: EVO gone CRAZY after service!!!

Hey, I’ll take this op to say that I just moved to mitsu as I bought myself an evo4. My partner has a 6 and i drove it... that was enough to win me over. Greetings to the Mitsubishi owners.

However, it was working perfectly for about a month… then I took it to service (won’t mention the mechanic’s name) and all hell broke loose.

1. When I got the car back, the boost wasn’t swinging like it did before… I check the plugs, plug wires, coil pack etc. while checking the plugs and coils I think I did something wrong because the car started a slight misfire and begasn breaking up after 4000 revs.
2. I’m going up the highway and suddenly, the car begins bucking while traveling at about 90km … the engine light is on and I have to pull aside and shut the car off. I restart and everything is relatively cool. But the problem recurs the next day.
3. The sound of my fuel pump (walbro) dips and jumps like its screaming in pain. It never did this before.
4. I’m sitting in traffic and suddenly the idle misses a beat, my cd-player seems to skip, all the gauges reset and the cd returns to the first track.
5. I ran diagnostics at two places but the engine light doesn’t come on all the time so I assume that the error message would not have shown in the scan. I also swapped coil packs with a partner but the problem persisted.

Please help/ suggest what I should do. I’m thinking voltage, plug wires, gapping of the plugs, a/f ratio, ecu probs, so I’m doing some trial and error … but I’m not a mechanic and definitely not familiar with an evo. Thanks in advance for the help, I need it asap.

Kronik · Posted: Sat Nov 21, 2009 11:50 am Post subject:

a fellow evo 4 owner, welcome

did your mechanic interfere with the electricals? what did you carry the car to service to do? what kind of boost controller do you have?

MISHI · Posted: Sat Nov 21, 2009 11:55 am Post subject:

venum · Posted: Sat Nov 21, 2009 2:33 pm Post subject:

^ ^ ^ Daddy done talk

Sanctifier · Posted: Sat Nov 21, 2009 5:32 pm Post subject:

Same question...Two posts...
From your other "Tech" post I thought your "service" was the usual engine-wash etc... not mechanical tuning.

Did your mechanic clean the engine?

SiRface · Posted: Sun Nov 22, 2009 10:50 am Post subject:

Guys,
Thanks a million. From the searches that I did in this forum I had expected to get some powerful responses, especially from MISHI and Sanctifier. I am quite grateful for the assistance.

The mechanic does an engine wash everytime he services a vehicle. I’ll run the necessary checks. However, thanks to your recommendations, I checked and was able to remedy the boost problem since I found a loose vacuum hose.

I’ll inform y’all of my progress as I continue trying to fix the other problems.

Any recommendations for an electrical mech? And i'll be going to Anil in waterloo from now for my mechanical work. Thanks.

MISHI · Posted: Sun Nov 22, 2009 11:19 am Post subject:

crazybalhead · Posted: Mon Nov 23, 2009 6:43 am Post subject:

I always wash with light pressure. Make sure i cover, MAF, Air filter, and the whole valve cover, Alternator. And even then, I tend to stay away from he engine itself. I've only done that twice on the VII and never on the VIII yet. Just a lil wipe down to keep things clean.

Lean Wid IT · Posted: Mon Nov 23, 2009 9:08 pm Post subject:

well i did an engine wash once and afterwards they used the air hose n blew out all the water and eevrything ran smoothly...no problems..and in terms of a good auto electrician...u can calll ryan 736 3571

he's good...i go by him and he deals with wiring the mitsubishis from evo's to vr4's........

give him a call

SiRface · Posted: Tue Nov 24, 2009 7:37 pm Post subject:

^^^I'll call him. Thanks.

MISHI · Posted: Tue Nov 24, 2009 10:16 pm Post subject:

how's it going so far though?

SiRface · Posted: Sun Nov 29, 2009 9:53 pm Post subject:

Thanks again for all the help

I ran through a few things on the car starting with an attempt to dry everything off with a low pressure compressor. Dried the plugs (was advised to spray a bit of wd40 on the tips) etc. I gapped the plugs to the recommended 0.6 and took the car out for another run. At first the breaking up stopped and then returned by the time I ran through the gears about three times. However, I’m using the BKR series plugs so I’ll be upgrading them to BPR on Monday once I get time to check. I was getting the regular BR8 (not iridium) and I’m also getting the BPR8 (iridium)… which should I use?

Regarding the electricals. I disconnected the battery poles for the ten minutes, and took the opportunity to change the somewhat corroded leads from lead to copper (I did this based on my physics knowledge… let me know if it was a good idea).

I also replaced a few fuses etc. I was talking to an electrician regarding the car and he was suggesting that due to the fact that the battery is located in the trunk, the battery should be connected straight to the starter (what do you think?). I also turned off my ebc and other electrical equipment which I don’t need for everyday use.

In the end, the misfiring died down significantly but the car is still breaking up around 4, 000 revs. When I got back, I found a tiny hole in one of the shafts that connects to the plugs. I’m going to replace the plug wires and see if the misfiring and breaking up stops. The car has not cut off since. I’ll update y’all. Thanks.

Lean Wid IT · Posted: Sun Nov 29, 2009 10:33 pm Post subject:

thas good to know u gettin through....well i believe once u change the plugs and wires u shudnt have a problem.....so keep us posted

MISHI · Posted: Sun Nov 29, 2009 10:49 pm Post subject:

Try the BPR8... and yeah the plug wire change will definately be a plus... For now possibly you could try and run a little silicone or something at the hole point and see if it helps...

Also not really fond of trunk battery installs... make sure there is good grounding and that the connections are good

Kronik · Posted: Sun Nov 29, 2009 11:05 pm Post subject:

^^i have a trunk installed (stinger) battery, and when the car idles rough you can see the (dash) lights dimming a little, need to check over those electricals!

MISHI · Posted: Mon Nov 30, 2009 9:03 am Post subject:

All evos do that apparently... mine is stock and does this... heard a couple other people who has this as well...

saltydog · Posted: Mon Nov 30, 2009 9:43 am Post subject:

crazybalhead · Posted: Mon Nov 30, 2009 10:19 am Post subject:

http://forums.trinituner.com/forums/viewtopic.php?t=278039

Salty that is not correct. See the above thread.

MISHI · Posted: Mon Nov 30, 2009 1:28 pm Post subject:

-sMoKe- · Street 2NR Joined: 24 Aug 2009 Tech posts: 37 My 2NRide:

everytime i engine wash my ck i experience some of the problems you stated...I either use the compressor to blow out the plugs or in serious cases open up the distributor cap n spray it out with wd40...im not a techy but that what i experience..