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SiRface
Ricer
Joined: 01 Jun 2007
Tech posts: 20
My 2NRide:
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 Posted: Sat Nov 21, 2009 9:21 am
Post subject: EVO gone CRAZY after service!!! |
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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. |
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Kronik
3NE2NR is my LIFE
Joined: 23 Jul 2004
Tech posts: 757
Location: Central
My 2NRide: Mitsubishi Evolution 4
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Posted: Sat Nov 21, 2009 11:50 am
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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? |
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MISHI
3NE 2NR Aficionado
Joined: 14 May 2003
Tech posts: 3015
Location: Hating Cancer...
My 2NRide: Mitsubishi Evolution VII
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Posted: Sat Nov 21, 2009 11:55 am
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| Quote: |
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
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Did you remove the plugs?
If you did check the plug gap.. should be 0.7 - 0.8 mm for stock coded plugs ( PGR7A)
but usually people gap 0.6 - 0.7 mm. Check it and see.
| Quote: |
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.
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Sensor failing or electrical... leaning more on electrical...
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3. The sound of my fuel pump (walbro) dips and jumps like its screaming in pain. It never did this before. |
Again electrical... sounds like a bad grounding point for the car... could be wrong though...
| Quote: | 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.
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That sounds like an electrical issue... check all your connections and see... especially grounding points. This can even cause ECU failure (or so i have heard) Check your alternator wiring and fuses, relays etc...
If you sent it to a mechanic and this happened, I'd take it back and demand they fix it properly or demand your money back. Find out what exactly was done and what was removed to service what (a connector may be loose or damaged for all you know...
Do a full reset of the car.... unplug the battery for 10 mins, reconnect the terminal and see. Check the ENTIRE bay for anything loose....
And get another mechanic...
Here's the manual for the EVO 4-5. check it properly
http://www.mundologico.com/nxtbook/Manual_Mitsubishi2009.pdf |
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venum
3NE2NR Diesel Boyz
Joined: 07 May 2004
Tech posts: 3639
Location: San Fernando
My 2NRide: Mitsubishi L200 Animal
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Posted: Sat Nov 21, 2009 2:33 pm
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| ^ ^ ^ Daddy done talk |
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Sanctifier
30 pounds of Boost
Joined: 09 Jun 2004
Tech posts: 2534
Location: Good question!
My 2NRide:
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Posted: Sat Nov 21, 2009 5:32 pm
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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 wrote: | I took my car to service (Evo4) and all hell broke loose.
3. The sound of my fuel pump (walbro) dips and jumps like its screaming in pain....
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.
...I’m not a mechanic... |
I’m not a mechanic either... nor an auto-electrician... but most of the symptoms described so far seem to be mainly electrical in nature. Most likely caused by servicing...water and electricity don't mix.
| Quote: | 1st CAREFULLY Disconnect...Dry (low-pressure air hose...5-10psi?)...Spray (Electronic Contact Cleaner)...Reconnect all the engines's sensors.
Less likely is an intermittent "short-to-earth"... (frayed or loose wiring touching the body somewhere.) |
IMHO before ripping off any more parts...
| Quote: | Check the NEGATIVE battery terminal.
Too many "mechanics" like to disconnect it...then leave the terminal "hand-tight."
Also check the OTHER END of the negative battery cable... now check the "positive" cable.
Make sure that you have a clean, rust-free "ground" connection...and clean terminals too.
Check battery, alternator charging rate (check all alternator wires) etc.
Check the ECU terminals and clean if necessary (Electronic Contact Cleaner) |
I can't think of any other simple causes. If symptoms are still there, find a good auto electrician.
Sorry no recommendations for one.
Last edited by Sanctifier on Sun Nov 22, 2009 5:54 pm; edited 1 time in total |
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SiRface
Ricer
Joined: 01 Jun 2007
Tech posts: 20
My 2NRide:
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Posted: Sun Nov 22, 2009 10:50 am
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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. |
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MISHI
3NE 2NR Aficionado
Joined: 14 May 2003
Tech posts: 3015
Location: Hating Cancer...
My 2NRide: Mitsubishi Evolution VII
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Posted: Sun Nov 22, 2009 11:19 am
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| Quote: |
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.
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there's your problem... (or part of it)
Engine washes are not something I am fond of, but a trick I have learned is that if you are doing it, don't use a hose... use a small bucket the lighty ash the area... then do not drive the car for the day. Areas that you don't want water entering such as plug areas, connectors, etc you cover with some plastic or even tape.
What you can do is remove the plug wires and see if there's moisture in the chamber where the plugs sit... you should see condensation on the plug sockets...
unclip some connectors around the engine bay and check for moisture... tap it lightly or blow it out... also the socket where it plugs into as well... |
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