2.8 woes
04-06-2016, 02:42 PM
#1
AudiWorld Newcomer
Thread Starter
Join Date: Apr 2016
Location: دولة الإمارات ال
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
2.8 woes
whats up everybody, im new here and am looking for some help to get my 1998 2.8 30 valve running up to par before I go supercharger.
I always had my eye on these older a4's since they first came out, and I finally got one a few weeks ago and its going to be my little project.
it idles rough on cold start up and barely stays running. when I rev the engine, it sometimes makes a backfiring popping sound coming out of the intake. when I try to drive it, it bucks horribly.
I went to fuss around with it today for a few minutes and I think the fuel pump took a dump. fuel pump fuse is okay, I swapped fuel pump relay with a known working one and it still did not start. I cracked open the fuel lines(one at a time) and cranked the car, no fuel came out. also, I dont hear the fuel pump humming when the ignition is turned on. i installed new fuel filter and spark plugs when i got the car.
these are the codes I scanned before the fuel pump took a dump today.
P0118-coolant temp sensor
P0102-maf circ low input
P1545-T.P. control malfunction
P1559-idle spd control malfunction
P1602-power supply (B+) terminal
30 low voltage
P0322-ign/dist engine spd no signal
before the fuel pump died, I unplugged the maf and coolant temp sensor one at a time to see if the car reacted any differently, it did not.
any help or input would be highly appreciated
I always had my eye on these older a4's since they first came out, and I finally got one a few weeks ago and its going to be my little project.
it idles rough on cold start up and barely stays running. when I rev the engine, it sometimes makes a backfiring popping sound coming out of the intake. when I try to drive it, it bucks horribly.
I went to fuss around with it today for a few minutes and I think the fuel pump took a dump. fuel pump fuse is okay, I swapped fuel pump relay with a known working one and it still did not start. I cracked open the fuel lines(one at a time) and cranked the car, no fuel came out. also, I dont hear the fuel pump humming when the ignition is turned on. i installed new fuel filter and spark plugs when i got the car.
these are the codes I scanned before the fuel pump took a dump today.
P0118-coolant temp sensor
P0102-maf circ low input
P1545-T.P. control malfunction
P1559-idle spd control malfunction
P1602-power supply (B+) terminal
30 low voltage
P0322-ign/dist engine spd no signal
before the fuel pump died, I unplugged the maf and coolant temp sensor one at a time to see if the car reacted any differently, it did not.
any help or input would be highly appreciated
04-07-2016, 11:35 AM
#2
AudiWorld Super User
Well, did you check power at the fuel pump? Its under the back seat. If there is power at the pump, than it is bad. If there is no power, the crankshaft position sensor must give a signal to the engine computer that the engine is cranking and then turns the pump on. You have a fault for that, the engine speed sesnor is the crankshaft position sesnor. If the crankshaft position sensor is bad, the fuel pump will not run. BUT, you should get a fuel pump prime for 3 seconds when turning the key to the ON position.
Your throttle and idle speed codes are either a bad throttle body or the throttle body needs to be ran through its adaption process. New throttle will have to be adapted also.
Your throttle and idle speed codes are either a bad throttle body or the throttle body needs to be ran through its adaption process. New throttle will have to be adapted also.
Thread
Thread Starter
Forum
Replies
Last Post
hhechmi
S4 (B6 & B7 Platforms) Discussion
0
12-15-2015 06:30 PM
zeems
Audi 90 / 80 / Coupe quattro / Cabriolet
34
09-08-2006 10:37 AM
OnTheGreen
Audi 90 / 80 / Coupe quattro / Cabriolet
17
12-01-2005 07:45 PM