Alfa Romeo Forums banner

1 - 11 of 11 Posts

·
Registered
Joined
·
13 Posts
Discussion Starter #1
I own a 1989 spider veloce quad. 4 cylinder two seater...and recently took it out of storage been a few years, had a mechanic not an alpha mech. specialist do some minor work on it.... replace the fuel tank, replace fuel sending pump and secondary fuel pump, engine sounded fine, ran it for a day and a half then bam...lost rpms and could not shift out of 2nd gear.

Had a flat body tow truck tow it to the same mechanic an hour later after tilting it off and sitting for 2 hours I said what the heck let's see. I cranked the engine and it ran again for about 10 minutes beautifully then again the loss of any rpms and puttering till the engine cut out.

Anyone have any clue as to what is causing this? Think it could be a computer sensor problem? Also recommend anyone who can look at it in Toronto area that doesn't cost an arm or leg?

Thanks for your help friends! Please email me at:

[email protected]

Reg
 

·
Registered
Joined
·
4 Posts
Hi I am also having a problem with my 1991 spider. It idles great but doesn't accelerate. My tach was acting funny before this problem started, any ideas?
 

·
Registered
Joined
·
4 Posts
hI it's been five days since my post and no new post. Well i have changed my fuel filter,disturbter cap,unplug my afm,all sensors,checked timeing and had my car at local mechanic for 2 days still does not run past 1000 rpms. Funny how it run the same with the afm unplugged does anyone find that strange. Pease help ready to give up.
 

·
1966-2013
Joined
·
13,741 Posts
If it runs the same with or without the AFM, then you're looking at an AFM issue or a wiring issue.

If at all possible, swap the AFM with a known working one. That'll confirm things right quick on whether it's wiring or the AFM. (if that's the actual problem)

How is the actual fuel pressure and volume?
 

·
Administrator
Joined
·
16,362 Posts
Sorry you didn't get more replies. Consider posting in the Spider section of the BB - more 'traffic' there.

Sure does sound like a problem with the AFM or the harness or the connector to the AFM. Check the connectors inside the harness plug. Sometimes one (or more) of the small male spade connectors get bent over and thus don't make a connection when plugged into the harness. Or, the female portion of the connector can get loose inside the connector and thus fail to make a connection.

The only other thing is to be sure there are no air leaks in the intake tract (between the AFM and the engine). The AFM must measure all the air entering the engine to send a proper signal to the ECU (computer) for it (the ECU) to send the proper signal for fuel injection. If there is a leak beyond the AFM, the AFM thus doesn't know you've opened the throttle. Your Spider has a TPS - Throttle Posistion Switch - not a Sensor. The TPS is used to tell the ECU when the throttle is closed and when it is open more than X number of degrees to signal the VVT. But it does not signal the ECU for fuel injection.

Here's a link to the Spider L-jet diagnosis web page.
 

·
Registered
Joined
·
4 Posts
Thank you for you replies. Just a thought I was replacing the clutch pedal pivot pin last week when this problem started and just noticed that the afm wiring runs right by there. Maybe I pinched the wires when I man handled the pedals back into the car? It was a one man show. Any thoughts on how I could test this?
 

·
1966-2013
Joined
·
13,741 Posts
If wires are in question, you'll need to get a multimeter and check for continuity from the AFM plug to the ECU plug (broken wire) and from the AFM plug to ground with the ECU disconnected (short)

Pins # 6, 9, 8, 7, and 27 are the ones you're after on the ECU end of things.
 

·
Registered
Joined
·
1,233 Posts
... Just a thought I was replacing the clutch pedal pivot pin last week when this problem started ...
The problem could be due to (major?) air leak. Check the brake booster vacuum hose since you worked around that area.
 

·
Registered
Joined
·
4 Posts
I shipped my car out to Toronto last week and it's finally finished. The mechanic said it would probably be something minor but it turns out a huge amount of hours and parts changed to get to the problem. I will pick it up today and go through the bill and the conclusion to the actual problem and will post back today. Thanks to everyone who posted to help me out much appreciated.
 
1 - 11 of 11 Posts
Top