1984 Mondial Cab. US version. Question for the ones that have been done it before. Has anybody replaced the front injectors on a Mondial cab? I can't even access the seeger rings in the two middle injectors with the tool. Apparently, the 308 has the engine further back. Would it be easier to remove the engine bonnet or the plenum? I am contemplating the plenum. There are plenty of posts about re-painting it, explaining to watch out for the spacers on the bottom, etc. In my case, I don't want to repaint it yet, only remove it enough to clear the injectors. Should I still remove the throttle body, throttle cable, cold start injector, etc? Also, for the O-Ring seals: what other vehicle uses it? Is is a VW Rabbit, Audi, etc? Thanks in advance. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Treat the in$ulalator$ with great care. Tho$e little pla$tic part$ that the injector$ $it in. They are unique to Ferrari. Injectors: http://www.autohausaz.com/search/product.aspx?sid=rpikgweh5s2ns5551qcknl55&makeid=800016@Mercedes&modelid=1194599@380SL&year=1983&cid=22@Fuel%20%26%20Air%20System&gid=6224@Fuel%20Injector Injector O ring: http://www.autohausaz.com/search/product.aspx?sid=rbj2z5ywvncdlw45umpufz21&partnumber=034133557E Best price and availablity I've seen for these.
Richard, DO NOT KNOW if this will help as I have a 308Si. I reach the forward bank (5-8) via the "crack" between the engine cover when it is open and the rear of the cabin. It is admittedly tight, but there is enough room in the 308 to get your hands and tools in there to work on that bank. Be careful of the paint. Removing the airbox ontop of the plenum really did not help me reach the front bank injectors/plugs, etc. much if at all. Good Luck.
Removing the engine lid is a hell of a lot easier than removing the plenum. However, if you pull the plenum, replace the coolant hoses under it while you are in there and save yourself some trouble later! Birdman
From the above pictures, is there another o-ring that fits outside of the plastic insulator? Is there a part number for that? Great info guys!
Ken, Plenum removal, , , yes get those hoses. Note; don't drop any of the 8 lil metal spacers into the open intake manifold. Have you opened the hatch behind the rearseats yet...? Goodluck, Edwardo
Only the two O-Rings shown in the pictures. One around the injector and one around the $280 bushing. I am now looking for Mercedez replacement O-Rings. The injectors are on way.
On my 3.2 mondia cab I couldn't get to the center 2 injectors on the forward bank so I ended up replacing just 6 injectors (better than none!). I removed the access panel in the interior/back seats, hoping to be able to access them but no go unfortunately. I think you'll have to remove the plenum to get to those two injectors... Good luck!
Hi CliffBeer, You just confirmed my fear of not being able to access those two middle ones. I too removed the access panel and tried to blindly remove the seeger rings with no luck. I suspect it is one of my forward injectors that is bad. Tomorrow I'll start the air plenum removal. BTW, where did you get the O-Rings and injectors? Did you get these injectors:? https://www.autohausaz.com/search/product.aspx?sid=wyakoynocaaax045fnn30255&partnumber=0%20437%20502%20047
Richard, How did the diagnosis come about that you need to replace the injectors to fix a Slow Down light issue? Is the thought that you don't have atomization and the fuel isn't igniting? I'm just curious because based on all I've read here over the years and your symptoms seem to indicate an ignition issue. (BTW, I bought the Autohauz injectors also. The shipping got botched at first, but they got here eventually and they worked just fine.) bh
Yep...no access that way! Exactly, Cliff! Standard proceedure here; remove the plenum to access the injectors. And while the plenum is off, replace those nasty water hoses underneath... Best, David
I second the be REAL careful not to drop any of the metal plenum spacer washers into the intake. Potential MAJOR headache. There are procedures on how to do this posted.
The diagnosis came from the mechanic while trouble shooting my failed emissions. I was surpised when he said it was a fuel issue and not the new 4040 wires and Iridium plugs. To me, it still sounds like one plug is not firing. I unplugged and checked all of them twice already for good contact. We'll see after I replace the injectors. Now you got me worried about the shipping, I did not receive an email confirmation.
If we presume that the ignition system is indeed "OK", a dripping injector can be audibly "heard," as the engine note will be perceivably different when the actual "drip" occurs. This can also be verified with an Exhaust Gas Analyzer... Then again, an ignition misfire can easily be verified, as an HC spike will be quickly visible on an Exhaust Gas Analyzer... Best, David
Richard - Did you mechanic sniff before or after the cat? I still don't know if you can see high HCs at all post cat. I suspect that you can't tell much unless it is gross. Does your car have one distributor or two? I'm wondering if you have two plug wires reversed. There was a thread here a month or so ago where some one was asserting that the numbers on the cap were not correct for the firing order. I don't remember the resolution. I haven't been there yet on my car. I think I would do some very careful investigation to make sure that when a plug fires that its cylinder is at TDC compression. Go through the dist cap(s) and make sure they follow the firing order. Or to be really sure rotate the engine by hand and when the dist is pointing to a lead, blow in the spark plug hole and see if the valves are closed. Of course you are most of the way into changing the injecors right now, so keep going. Even if they aren't really the problem it is a necessary and often overlooked maintenance item.
Thanks, guys. I just received the O-rings and injectors. This weekend I'll pull the plenum and replace the injectors. The gas analyzer was placed after the catalytic converter, using the standard smog test equipment in California. The California emissions test requires the vehicle to be on a threadmill. When it is going at 15 mph and 25 mph, the engine sounds like a lawn mower. Like one plug is not firing. Or maybe it is the dripping of an injector, as you mentioned. There was no smell of raw gas, maybe the cat is doing its job?
I spent the whole weekend to replace the two middle front injectors!!! I couldn't remove the injectors because the plenum is in the way. And I couldn't remove the plenum because the tubes of the injectors were on the way! Talk about a chicken and egg deal here!! I ended up removing the front access plate and the engine bonnet. There is very little room for the 12 mm and 14 mm wrenches. Though the injectors did come out and the new brass ones with new seals went in. I have seen posts where only the front two external injectors were replaced. I don't blame those posters. After starting, the engine was still running rough. Dang!!! Here we go again!!!! Now the injectors are all new, it can't be that. Triple checked and all plugs had ignition. I then removed all the extenders. One appeared to have been burnt through. So I plugged the 4040R wires directly to the plugs with the long nose pliers. Still running like a lawnmower. Then I brought my laser guided thermometor. I measured the temperature on each exhaust close to the head while it was warming up. In a few minutes, 6 cylinders were at 160 to 200 deg C, but cylinders 2 and 3 were at 80 deg C. Shorly after, some were reading HI (out of range for my meter). Checked, they both had spark. I then traced back to the number rings and I had them reversed!! The #2 and #3 rings were very close. 8 pairs of eyes looked at the wires!!! I'll finish it up and take it back to the mechanic to finish adjusting the fuel mixture. When the engine warms up, it tends to die. I don't want to mess with the adjustment. Thanks all for the support!!! Side note: The 4040R wires with the Ferrari boots look great. Look at the picture below, there are no extenders under the boots. Image Unavailable, Please Login Image Unavailable, Please Login
